72471377 has 24 divisors (see below), whose sum is σ = 86822400. Its totient is φ = 60207840.

The previous prime is 72471353. The next prime is 72471409. The reversal of 72471377 is 77317427.

It is a happy number.

It is not a de Polignac number, because 72471377 - 2¹⁰ = 72470353 is a prime.

It is a super-2 number, since 2×72471377² = 10504200968552258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72471377.

It is not an unprimeable number, because it can be changed into a prime (72471317) 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, 66128 + ... + 67214.

It is an arithmetic number, because the mean of its divisors is an integer number (3617600).

Almost surely, 2^72471377 is an apocalyptic number.

It is an amenable number.

72471377 is a deficient number, since it is larger than the sum of its proper divisors (14351023).

72471377 is a wasteful number, since it uses less digits than its factorization.

72471377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1146 counting only the distinct ones).

The product of its digits is 57624, while the sum is 38.

The square root of 72471377 is about 8513.0122166011. The cubic root of 72471377 is about 416.9226643021.

The spelling of 72471377 in words is "seventy-two million, four hundred seventy-one thousand, three hundred seventy-seven".