72673240 has 16 divisors (see below), whose sum is σ = 163514880. Its totient is φ = 29069280.

The previous prime is 72673213. The next prime is 72673241. The reversal of 72673240 is 4237627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72673241) 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, 908376 + ... + 908455.

It is an arithmetic number, because the mean of its divisors is an integer number (10219680).

Almost surely, 2^72673240 is an apocalyptic number.

It is an amenable number.

72673240 is an abundant number, since it is smaller than the sum of its proper divisors (90841640).

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

72673240 is a wasteful number, since it uses less digits than its factorization.

72673240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816842 (or 1816838 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 72673240 is about 8524.8601161544. The cubic root of 72673240 is about 417.3094065929.

The spelling of 72673240 in words is "seventy-two million, six hundred seventy-three thousand, two hundred forty".