642088992 has 48 divisors (see below), whose sum is σ = 1689593472. Its totient is φ = 213507840.

The previous prime is 642088973. The next prime is 642089003. The reversal of 642088992 is 299880246.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32473 + ... + 48359.

It is an arithmetic number, because the mean of its divisors is an integer number (35199864).

Almost surely, 2^642088992 is an apocalyptic number.

It is an amenable number.

642088992 is an abundant number, since it is smaller than the sum of its proper divisors (1047504480).

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

642088992 is a wasteful number, since it uses less digits than its factorization.

642088992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321 (or 16313 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 642088992 is about 25339.4749748293. The cubic root of 642088992 is about 862.7104820477.

The spelling of 642088992 in words is "six hundred forty-two million, eighty-eight thousand, nine hundred ninety-two".