642353460 has 48 divisors (see below), whose sum is σ = 2055532416. Its totient is φ = 146823552.

The previous prime is 642353443. The next prime is 642353461. The reversal of 642353460 is 64353246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642353461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764287 + ... + 765126.

It is an arithmetic number, because the mean of its divisors is an integer number (42823592).

Almost surely, 2^642353460 is an apocalyptic number.

642353460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642353460 is an abundant number, since it is smaller than the sum of its proper divisors (1413178956).

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

642353460 is a wasteful number, since it uses less digits than its factorization.

642353460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529432 (or 1529430 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 642353460 is about 25344.6929356029. The cubic root of 642353460 is about 862.8289121514.

The spelling of 642353460 in words is "six hundred forty-two million, three hundred fifty-three thousand, four hundred sixty".