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31430754 = 234194017
BaseRepresentation
bin111011111100…
…1100001100010
32012010211220000
41313321201202
531021241004
63041400430
7531104565
oct167714142
965124800
1031430754
1116818433
12a639116
1366862a4
1442624dc
152b5cc39
hex1df9862

31430754 has 20 divisors (see below), whose sum is σ = 70428534. Its totient is φ = 10476864.

The previous prime is 31430753. The next prime is 31430761. The reversal of 31430754 is 45703413.

It can be written as a sum of positive squares in only one way, i.e., 18275625 + 13155129 = 4275^2 + 3627^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31430753) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 96847 + ... + 97170.

Almost surely, 231430754 is an apocalyptic number.

31430754 is an abundant number, since it is smaller than the sum of its proper divisors (38997780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31430754 is a wasteful number, since it uses less digits than its factorization.

31430754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194031 (or 194022 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 31430754 is about 5606.3137621792. The cubic root of 31430754 is about 315.5863907156.

The spelling of 31430754 in words is "thirty-one million, four hundred thirty thousand, seven hundred fifty-four".

Divisors: 1 2 3 6 9 18 27 54 81 162 194017 388034 582051 1164102 1746153 3492306 5238459 10476918 15715377 31430754