72434240 has 28 divisors (see below), whose sum is σ = 172484796. Its totient is φ = 28973568.

The previous prime is 72434239. The next prime is 72434279. The reversal of 72434240 is 4243427.

It can be written as a sum of positive squares in 2 ways, for example, as 52649536 + 19784704 = 7256^2 + 4448^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112859 + ... + 113498.

Almost surely, 2^72434240 is an apocalyptic number.

It is an amenable number.

72434240 is an abundant number, since it is smaller than the sum of its proper divisors (100050556).

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

72434240 is a wasteful number, since it uses less digits than its factorization.

72434240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226374 (or 226364 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 72434240 is about 8510.8307467603. The cubic root of 72434240 is about 416.8514366298.

Adding to 72434240 its reverse (4243427), we get a palindrome (76677667).

The spelling of 72434240 in words is "seventy-two million, four hundred thirty-four thousand, two hundred forty".