72757274 has 4 divisors (see below), whose sum is σ = 109135914. Its totient is φ = 36378636.

The previous prime is 72757273. The next prime is 72757277. The reversal of 72757274 is 47275727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 24552025 = 6943^2 + 4955^2 .

It is a super-2 number, since 2×72757274² = 10587241839822152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72757273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18189317 + ... + 18189320.

Almost surely, 2^72757274 is an apocalyptic number.

72757274 is a deficient number, since it is larger than the sum of its proper divisors (36378640).

72757274 is a wasteful number, since it uses less digits than its factorization.

72757274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36378639.

The product of its digits is 192080, while the sum is 41.

The square root of 72757274 is about 8529.7874533894. The cubic root of 72757274 is about 417.4701932896.

The spelling of 72757274 in words is "seventy-two million, seven hundred fifty-seven thousand, two hundred seventy-four".