642737460 has 48 divisors (see below), whose sum is σ = 1801058112. Its totient is φ = 171264000.

The previous prime is 642737371. The next prime is 642737467. The reversal of 642737460 is 64737246.

642737460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642737460² = 826222884974503200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642737467) 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, 92715 + ... + 99405.

It is an arithmetic number, because the mean of its divisors is an integer number (37522044).

Almost surely, 2^642737460 is an apocalyptic number.

642737460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642737460 is an abundant number, since it is smaller than the sum of its proper divisors (1158320652).

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

642737460 is a wasteful number, since it uses less digits than its factorization.

642737460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304 (or 8302 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 39.

The square root of 642737460 is about 25352.2673542230. The cubic root of 642737460 is about 863.0008114365. Note that the first 3 decimals are identical.

The spelling of 642737460 in words is "six hundred forty-two million, seven hundred thirty-seven thousand, four hundred sixty".