72101396 has 6 divisors (see below), whose sum is σ = 126177450. Its totient is φ = 36050696.

The previous prime is 72101387. The next prime is 72101401. The reversal of 72101396 is 69310127.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 698896 = 8450^2 + 836^2 .

It is a super-2 number, since 2×72101396² = 10397222610297632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012671 + ... + 9012678.

It is an arithmetic number, because the mean of its divisors is an integer number (21029575).

Almost surely, 2^72101396 is an apocalyptic number.

It is an amenable number.

72101396 is a deficient number, since it is larger than the sum of its proper divisors (54076054).

72101396 is a wasteful number, since it uses less digits than its factorization.

72101396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18025353 (or 18025351 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 72101396 is about 8491.2540887669. The cubic root of 72101396 is about 416.2119620632.

The spelling of 72101396 in words is "seventy-two million, one hundred one thousand, three hundred ninety-six".