242391604 has 48 divisors (see below), whose sum is σ = 538940416. Its totient is φ = 92793600.

The previous prime is 242391601. The next prime is 242391619. The reversal of 242391604 is 406193242.

242391604 = T₄₁ + T₄₂ + ... + T₁₁₃₂.

It is a happy number.

242391604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242391601) 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, 544 + ... + 22024.

Almost surely, 2^242391604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 242391604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269470208).

242391604 is an abundant number, since it is smaller than the sum of its proper divisors (296548812).

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

242391604 is a wasteful number, since it uses less digits than its factorization.

242391604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21536 (or 21534 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 242391604 is about 15568.9307275741. The cubic root of 242391604 is about 623.5039237468.

The spelling of 242391604 in words is "two hundred forty-two million, three hundred ninety-one thousand, six hundred four".