1564796940 has 48 divisors (see below), whose sum is σ = 5007351552. Its totient is φ = 357667776.

The previous prime is 1564796917. The next prime is 1564797023. The reversal of 1564796940 is 496974651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862434 + ... + 1863273.

It is an arithmetic number, because the mean of its divisors is an integer number (104319824).

Almost surely, 2^1564796940 is an apocalyptic number.

1564796940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564796940 is an abundant number, since it is smaller than the sum of its proper divisors (3442554612).

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

1564796940 is a wasteful number, since it uses less digits than its factorization.

1564796940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725726 (or 3725724 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 1564796940 is about 39557.5143304025. The cubic root of 1564796940 is about 1160.9655407263.

The spelling of 1564796940 in words is "one billion, five hundred sixty-four million, seven hundred ninety-six thousand, nine hundred forty".