72255492 has 18 divisors (see below), whose sum is σ = 182645918. Its totient is φ = 24085152.

The previous prime is 72255479. The next prime is 72255503. The reversal of 72255492 is 29455227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48108096 + 24147396 = 6936^2 + 4914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×72255492² = 10441712248324128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2007097 = 72255492 / (7 + 2 + 2 + 5 + 5 + 4 + 9 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1003513 + ... + 1003584.

Almost surely, 2^72255492 is an apocalyptic number.

It is an amenable number.

72255492 is an abundant number, since it is smaller than the sum of its proper divisors (110390426).

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

72255492 is a wasteful number, since it uses less digits than its factorization.

72255492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007107 (or 2007102 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 72255492 is about 8500.3230526845. The cubic root of 72255492 is about 416.5082622047.

The spelling of 72255492 in words is "seventy-two million, two hundred fifty-five thousand, four hundred ninety-two".