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30624641 = 37827693
BaseRepresentation
bin111010011010…
…0101110000001
32010121220002222
41310310232001
530314442031
63012220425
7521206445
oct164645601
963556088
1030624641
1116317823
12a30a715
1364633b8
1440d2825
152a4de7b
hex1d34b81

30624641 has 4 divisors (see below), whose sum is σ = 31452372. Its totient is φ = 29796912.

The previous prime is 30624631. The next prime is 30624647. The reversal of 30624641 is 14642603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 5424241 = 5020^2 + 2329^2 .

It is a cyclic number.

It is not a de Polignac number, because 30624641 - 210 = 30623617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30624641.

It is not an unprimeable number, because it can be changed into a prime (30624647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413810 + ... + 413883.

It is an arithmetic number, because the mean of its divisors is an integer number (7863093).

Almost surely, 230624641 is an apocalyptic number.

It is an amenable number.

30624641 is a deficient number, since it is larger than the sum of its proper divisors (827731).

30624641 is an equidigital number, since it uses as much as digits as its factorization.

30624641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827730.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 30624641 is about 5533.9534692659. The cubic root of 30624641 is about 312.8650147595.

The spelling of 30624641 in words is "thirty million, six hundred twenty-four thousand, six hundred forty-one".

Divisors: 1 37 827693 30624641