72745874 has 4 divisors (see below), whose sum is σ = 109118814. Its totient is φ = 36372936.

The previous prime is 72745867. The next prime is 72745877. The reversal of 72745874 is 47854727.

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., 49773025 + 22972849 = 7055^2 + 4793^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72745877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18186467 + ... + 18186470.

Almost surely, 2^72745874 is an apocalyptic number.

72745874 is a deficient number, since it is larger than the sum of its proper divisors (36372940).

72745874 is a wasteful number, since it uses less digits than its factorization.

72745874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372939.

The product of its digits is 439040, while the sum is 44.

The square root of 72745874 is about 8529.1191807830. The cubic root of 72745874 is about 417.4483883276.

The spelling of 72745874 in words is "seventy-two million, seven hundred forty-five thousand, eight hundred seventy-four".