642279360 has 112 divisors (see below), whose sum is σ = 2045915136. Its totient is φ = 170714112.

The previous prime is 642279349. The next prime is 642279371. The reversal of 642279360 is 63972246.

It is an interprime number because it is at equal distance from previous prime (642279349) and next prime (642279371).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351409 + ... + 353231.

Almost surely, 2^642279360 is an apocalyptic number.

642279360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642279360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022957568).

642279360 is an abundant number, since it is smaller than the sum of its proper divisors (1403635776).

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

642279360 is a wasteful number, since it uses less digits than its factorization.

642279360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 642279360 is about 25343.2310489409. The cubic root of 642279360 is about 862.7957330763.

The spelling of 642279360 in words is "six hundred forty-two million, two hundred seventy-nine thousand, three hundred sixty".