1625404340 has 48 divisors (see below), whose sum is σ = 4130445312. Its totient is φ = 524499456.

The previous prime is 1625404283. The next prime is 1625404427. The reversal of 1625404340 is 434045261.

It is a congruent number.

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, 339092 + ... + 343851.

It is an arithmetic number, because the mean of its divisors is an integer number (86050944).

Almost surely, 2^1625404340 is an apocalyptic number.

1625404340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625404340 is an abundant number, since it is smaller than the sum of its proper divisors (2505040972).

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

1625404340 is a wasteful number, since it uses less digits than its factorization.

1625404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682976 (or 682974 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1625404340 is about 40316.3036500124. The cubic root of 1625404340 is about 1175.7648474319.

The spelling of 1625404340 in words is "one billion, six hundred twenty-five million, four hundred four thousand, three hundred forty".