72974222 has 4 divisors (see below), whose sum is σ = 109461336. Its totient is φ = 36487110.

The previous prime is 72974203. The next prime is 72974243. The reversal of 72974222 is 22247927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22247927 = 13 ⋅1711379.

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, 18243554 + ... + 18243557.

It is an arithmetic number, because the mean of its divisors is an integer number (27365334).

Almost surely, 2^72974222 is an apocalyptic number.

72974222 is a deficient number, since it is larger than the sum of its proper divisors (36487114).

72974222 is a wasteful number, since it uses less digits than its factorization.

72974222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36487113.

The product of its digits is 28224, while the sum is 35.

The square root of 72974222 is about 8542.4950687724. The cubic root of 72974222 is about 417.8847197799.

The spelling of 72974222 in words is "seventy-two million, nine hundred seventy-four thousand, two hundred twenty-two".