72434312 has 16 divisors (see below), whose sum is σ = 135909900. Its totient is φ = 36191680.

The previous prime is 72434311. The next prime is 72434347. The reversal of 72434312 is 21343427.

It can be written as a sum of positive squares in 2 ways, for example, as 46158436 + 26275876 = 6794^2 + 5126^2 .

It is not an unprimeable number, because it can be changed into a prime (72434311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15014 + ... + 19242.

Almost surely, 2^72434312 is an apocalyptic number.

It is an amenable number.

72434312 is a deficient number, since it is larger than the sum of its proper divisors (63475588).

72434312 is a wasteful number, since it uses less digits than its factorization.

72434312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376 (or 6372 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 72434312 is about 8510.8349766636. The cubic root of 72434312 is about 416.8515747472.

Adding to 72434312 its reverse (21343427), we get a palindrome (93777739).

It can be divided in two parts, 72 and 434312, that multiplied together give a square (31270464 = 5592²).

The spelling of 72434312 in words is "seventy-two million, four hundred thirty-four thousand, three hundred twelve".