72400607 has 4 divisors (see below), whose sum is σ = 72602640. Its totient is φ = 72198576.

The previous prime is 72400591. The next prime is 72400639. The reversal of 72400607 is 70600427.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72400607 - 2⁴ = 72400591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72405607) 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, 100478 + ... + 101195.

It is an arithmetic number, because the mean of its divisors is an integer number (18150660).

Almost surely, 2^72400607 is an apocalyptic number.

72400607 is a deficient number, since it is larger than the sum of its proper divisors (202033).

72400607 is a wasteful number, since it uses less digits than its factorization.

72400607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202032.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72400607 is about 8508.8546232733. The cubic root of 72400607 is about 416.7869085150.

The spelling of 72400607 in words is "seventy-two million, four hundred thousand, six hundred seven".