72102470 has 32 divisors (see below), whose sum is σ = 147744000. Its totient is φ = 25078240.

The previous prime is 72102451. The next prime is 72102479. The reversal of 72102470 is 7420127.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11720 + ... + 16779.

It is an arithmetic number, because the mean of its divisors is an integer number (4617000).

Almost surely, 2^72102470 is an apocalyptic number.

72102470 is an abundant number, since it is smaller than the sum of its proper divisors (75641530).

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

72102470 is a wasteful number, since it uses less digits than its factorization.

72102470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28540.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 72102470 is about 8491.3173300731. The cubic root of 72102470 is about 416.2140286410.

Adding to 72102470 its reverse (7420127), we get a palindrome (79522597).

The spelling of 72102470 in words is "seventy-two million, one hundred two thousand, four hundred seventy".