242911638 has 48 divisors (see below), whose sum is σ = 538130736. Its totient is φ = 79168320.

The previous prime is 242911633. The next prime is 242911679. The reversal of 242911638 is 836119242.

242911638 is a `hidden beast` number, since 2 + 4 + 2 + 9 + 11 + 638 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242911631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215745 + ... + 216867.

It is an arithmetic number, because the mean of its divisors is an integer number (11211057).

Almost surely, 2^242911638 is an apocalyptic number.

242911638 is an abundant number, since it is smaller than the sum of its proper divisors (295219098).

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

242911638 is a wasteful number, since it uses less digits than its factorization.

242911638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1386 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 242911638 is about 15585.6227979507. The cubic root of 242911638 is about 623.9494997346.

The spelling of 242911638 in words is "two hundred forty-two million, nine hundred eleven thousand, six hundred thirty-eight".