1620957356 has 12 divisors (see below), whose sum is σ = 2868548760. Its totient is φ = 801372000.

The previous prime is 1620957343. The next prime is 1620957379. The reversal of 1620957356 is 6537590261.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 2276270 + ... + 2276981.

It is an arithmetic number, because the mean of its divisors is an integer number (239045730).

Almost surely, 2^1620957356 is an apocalyptic number.

It is an amenable number.

1620957356 is a deficient number, since it is larger than the sum of its proper divisors (1247591404).

1620957356 is a wasteful number, since it uses less digits than its factorization.

1620957356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553344 (or 4553342 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 1620957356 is about 40261.1146889899. The cubic root of 1620957356 is about 1174.6916000035.

The spelling of 1620957356 in words is "one billion, six hundred twenty million, nine hundred fifty-seven thousand, three hundred fifty-six".