72434407 has 4 divisors (see below), whose sum is σ = 72452016. Its totient is φ = 72416800.

The previous prime is 72434377. The next prime is 72434471. The reversal of 72434407 is 70443427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70443427 = 17 ⋅4143731.

It is a cyclic number.

It is not a de Polignac number, because 72434407 - 2⁷ = 72434279 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72434207) 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, 1023 + ... + 12079.

It is an arithmetic number, because the mean of its divisors is an integer number (18113004).

Almost surely, 2^72434407 is an apocalyptic number.

72434407 is a deficient number, since it is larger than the sum of its proper divisors (17609).

72434407 is a wasteful number, since it uses less digits than its factorization.

72434407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17608.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 72434407 is about 8510.8405577828. The cubic root of 72434407 is about 416.8517569854.

The spelling of 72434407 in words is "seventy-two million, four hundred thirty-four thousand, four hundred seven".