1625646240 has 96 divisors (see below), whose sum is σ = 5689776960. Its totient is φ = 433504512.

The previous prime is 1625646229. The next prime is 1625646277. The reversal of 1625646240 is 426465261.

1625646240 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 646 + 2 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1625646240² = 5285451395252275200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 1625646195 and 1625646204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183834 + ... + 192473.

It is an arithmetic number, because the mean of its divisors is an integer number (59268510).

Almost surely, 2^1625646240 is an apocalyptic number.

1625646240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625646240 is an abundant number, since it is smaller than the sum of its proper divisors (4064130720).

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

1625646240 is a wasteful number, since it uses less digits than its factorization.

1625646240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376331 (or 376317 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1625646240 is about 40319.3035654139. The cubic root of 1625646240 is about 1175.8231720800.

The spelling of 1625646240 in words is "one billion, six hundred twenty-five million, six hundred forty-six thousand, two hundred forty".