72209400 has 48 divisors (see below), whose sum is σ = 223851000. Its totient is φ = 19255680.

The previous prime is 72209399. The next prime is 72209411. The reversal of 72209400 is 490227.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59575 + ... + 60774.

Almost surely, 2^72209400 is an apocalyptic number.

It is an amenable number.

72209400 is an abundant number, since it is smaller than the sum of its proper divisors (151641600).

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

72209400 is a wasteful number, since it uses less digits than its factorization.

72209400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120368 (or 120359 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 72209400 is about 8497.6114291017. The cubic root of 72209400 is about 416.4196794002.

Adding to 72209400 its reverse (490227), we get a palindrome (72699627).

The spelling of 72209400 in words is "seventy-two million, two hundred nine thousand, four hundred".