642460038 has 16 divisors (see below), whose sum is σ = 1401731136. Its totient is φ = 194684840.

The previous prime is 642460019. The next prime is 642460051. The reversal of 642460038 is 830064246.

It is a super-2 number, since 2×642460038² = 825509800853922888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 642459990 and 642460008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4867056 + ... + 4867187.

It is an arithmetic number, because the mean of its divisors is an integer number (87608196).

Almost surely, 2^642460038 is an apocalyptic number.

642460038 is an abundant number, since it is smaller than the sum of its proper divisors (759271098).

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

642460038 is a wasteful number, since it uses less digits than its factorization.

642460038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9734259.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 642460038 is about 25346.7954187507. The cubic root of 642460038 is about 862.8766291277.

The spelling of 642460038 in words is "six hundred forty-two million, four hundred sixty thousand, thirty-eight".