72644070 has 16 divisors (see below), whose sum is σ = 174345840. Its totient is φ = 19371744.

The previous prime is 72644063. The next prime is 72644083. The reversal of 72644070 is 7044627.

It is a super-3 number, since 3×72644070³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2421469 = 72644070 / (7 + 2 + 6 + 4 + 4 + 0 + 7 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210705 + ... + 1210764.

It is an arithmetic number, because the mean of its divisors is an integer number (10896615).

Almost surely, 2^72644070 is an apocalyptic number.

72644070 is an abundant number, since it is smaller than the sum of its proper divisors (101701770).

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

72644070 is a wasteful number, since it uses less digits than its factorization.

72644070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421479.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 72644070 is about 8523.1490659263. The cubic root of 72644070 is about 417.2535651102.

Adding to 72644070 its reverse (7044627), we get a palindrome (79688697).

The spelling of 72644070 in words is "seventy-two million, six hundred forty-four thousand, seventy".