72477620 has 12 divisors (see below), whose sum is σ = 152203044. Its totient is φ = 28991040.

The previous prime is 72477611. The next prime is 72477653. The reversal of 72477620 is 2677427.

It can be written as a sum of positive squares in 2 ways, for example, as 16467364 + 56010256 = 4058^2 + 7484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811921 + ... + 1811960.

It is an arithmetic number, because the mean of its divisors is an integer number (12683587).

Almost surely, 2^72477620 is an apocalyptic number.

It is an amenable number.

72477620 is an abundant number, since it is smaller than the sum of its proper divisors (79725424).

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

72477620 is a wasteful number, since it uses less digits than its factorization.

72477620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623890 (or 3623888 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 72477620 is about 8513.3788826764. The cubic root of 72477620 is about 416.9346358029.

The spelling of 72477620 in words is "seventy-two million, four hundred seventy-seven thousand, six hundred twenty".