1625460840 has 48 divisors (see below), whose sum is σ = 5282748900. Its totient is φ = 433456128.

The previous prime is 1625460833. The next prime is 1625460847. The reversal of 1625460840 is 480645261.

1625460840 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 4 + 608 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1625460833) and next prime (1625460847).

It can be written as a sum of positive squares in 2 ways, for example, as 1586747556 + 38713284 = 39834^2 + 6222^2 .

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 = 1625460795 and 1625460804.

It is not an unprimeable number, because it can be changed into a prime (1625460847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2257225 + ... + 2257944.

Almost surely, 2^1625460840 is an apocalyptic number.

1625460840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625460840 is an abundant number, since it is smaller than the sum of its proper divisors (3657288060).

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

1625460840 is a wasteful number, since it uses less digits than its factorization.

1625460840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515186 (or 4515179 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1625460840 is about 40317.0043530022. The cubic root of 1625460840 is about 1175.7784706974.

The spelling of 1625460840 in words is "one billion, six hundred twenty-five million, four hundred sixty thousand, eight hundred forty".