242815644 has 30 divisors (see below), whose sum is σ = 634768904. Its totient is φ = 80938440.

The previous prime is 242815633. The next prime is 242815673. The reversal of 242815644 is 446518242.

242815644 is a `hidden beast` number, since 2 + 4 + 2 + 8 + 1 + 5 + 644 = 666.

242815644 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 2×242815644² = 117918873942269472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 242815599 and 242815608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 374392 + ... + 375039.

Almost surely, 2^242815644 is an apocalyptic number.

It is an amenable number.

242815644 is an abundant number, since it is smaller than the sum of its proper divisors (391953260).

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

242815644 is a wasteful number, since it uses less digits than its factorization.

242815644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749447 (or 749436 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 242815644 is about 15582.5429246962. The cubic root of 242815644 is about 623.8672979646.

The spelling of 242815644 in words is "two hundred forty-two million, eight hundred fifteen thousand, six hundred forty-four".