72478955 has 4 divisors (see below), whose sum is σ = 86974752. Its totient is φ = 57983160.

The previous prime is 72478949. The next prime is 72478993. The reversal of 72478955 is 55987427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55987427 = 41 ⋅1365547.

It is not a de Polignac number, because 72478955 - 2¹⁸ = 72216811 is a prime.

It is a Duffinian 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, 7247891 + ... + 7247900.

It is an arithmetic number, because the mean of its divisors is an integer number (21743688).

Almost surely, 2^72478955 is an apocalyptic number.

72478955 is a deficient number, since it is larger than the sum of its proper divisors (14495797).

72478955 is a wasteful number, since it uses less digits than its factorization.

72478955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495796.

The product of its digits is 705600, while the sum is 47.

The square root of 72478955 is about 8513.4572883171. The cubic root of 72478955 is about 416.9371956935.

The spelling of 72478955 in words is "seventy-two million, four hundred seventy-eight thousand, nine hundred fifty-five".