642455310 has 64 divisors (see below), whose sum is σ = 1764628992. Its totient is φ = 146641536.

The previous prime is 642455291. The next prime is 642455323. The reversal of 642455310 is 13554246.

It is a super-2 number, since 2×642455310² = 825497650694392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188784 + ... + 192156.

It is an arithmetic number, because the mean of its divisors is an integer number (27572328).

Almost surely, 2^642455310 is an apocalyptic number.

642455310 is an abundant number, since it is smaller than the sum of its proper divisors (1122173682).

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

642455310 is a wasteful number, since it uses less digits than its factorization.

642455310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 642455310 is about 25346.7021523511. The cubic root of 642455310 is about 862.8745124249.

The spelling of 642455310 in words is "six hundred forty-two million, four hundred fifty-five thousand, three hundred ten".