1620574732 has 48 divisors (see below), whose sum is σ = 3294446400. Its totient is φ = 683200512.

The previous prime is 1620574727. The next prime is 1620574741. The reversal of 1620574732 is 2374750261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1620574691 and 1620574700.

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, 468144 + ... + 471592.

It is an arithmetic number, because the mean of its divisors is an integer number (68634300).

Almost surely, 2^1620574732 is an apocalyptic number.

It is an amenable number.

1620574732 is an abundant number, since it is smaller than the sum of its proper divisors (1673871668).

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

1620574732 is a wasteful number, since it uses less digits than its factorization.

1620574732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 1620574732 is about 40256.3626275400. The cubic root of 1620574732 is about 1174.5991648002.

The spelling of 1620574732 in words is "one billion, six hundred twenty million, five hundred seventy-four thousand, seven hundred thirty-two".