72381477 has 24 divisors (see below), whose sum is σ = 116143200. Its totient is φ = 39932256.

The previous prime is 72381473. The next prime is 72381479. The reversal of 72381477 is 77418327.

It is not a de Polignac number, because 72381477 - 2² = 72381473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72381473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4227 + ... + 12752.

It is an arithmetic number, because the mean of its divisors is an integer number (4839300).

Almost surely, 2^72381477 is an apocalyptic number.

It is an amenable number.

72381477 is a deficient number, since it is larger than the sum of its proper divisors (43761723).

72381477 is a wasteful number, since it uses less digits than its factorization.

72381477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17025 (or 17018 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 72381477 is about 8507.7304259127. The cubic root of 72381477 is about 416.7501968712.

The spelling of 72381477 in words is "seventy-two million, three hundred eighty-one thousand, four hundred seventy-seven".