642502630 has 64 divisors (see below), whose sum is σ = 1465620480. Its totient is φ = 196963200.

The previous prime is 642502589. The next prime is 642502633. The reversal of 642502630 is 36205246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642502633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40131 + ... + 53809.

It is an arithmetic number, because the mean of its divisors is an integer number (22900320).

Almost surely, 2^642502630 is an apocalyptic number.

642502630 is an abundant number, since it is smaller than the sum of its proper divisors (823117850).

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

642502630 is a wasteful number, since it uses less digits than its factorization.

642502630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13765.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 642502630 is about 25347.6355899322. The cubic root of 642502630 is about 862.8956968917.

Adding to 642502630 its reverse (36205246), we get a palindrome (678707876).

The spelling of 642502630 in words is "six hundred forty-two million, five hundred two thousand, six hundred thirty".