1620253430 has 8 divisors (see below), whose sum is σ = 2916456192. Its totient is φ = 648101368.

The previous prime is 1620253399. The next prime is 1620253447. The reversal of 1620253430 is 343520261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1620253430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81012662 + ... + 81012681.

It is an arithmetic number, because the mean of its divisors is an integer number (364557024).

Almost surely, 2^1620253430 is an apocalyptic number.

1620253430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620253430 is a deficient number, since it is larger than the sum of its proper divisors (1296202762).

1620253430 is a wasteful number, since it uses less digits than its factorization.

1620253430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162025350.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1620253430 is about 40252.3717313651. The cubic root of 1620253430 is about 1174.5215326701.

Adding to 1620253430 its reverse (343520261), we get a palindrome (1963773691).

The spelling of 1620253430 in words is "one billion, six hundred twenty million, two hundred fifty-three thousand, four hundred thirty".