72974890 has 8 divisors (see below), whose sum is σ = 131354820. Its totient is φ = 29189952.

The previous prime is 72974851. The next prime is 72974903. The reversal of 72974890 is 9847927.

It can be written as a sum of positive squares in 2 ways, for example, as 68906601 + 4068289 = 8301^2 + 2017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72974890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648735 + ... + 3648754.

Almost surely, 2^72974890 is an apocalyptic number.

72974890 is a deficient number, since it is larger than the sum of its proper divisors (58379930).

72974890 is a wasteful number, since it uses less digits than its factorization.

72974890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297496.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 72974890 is about 8542.5341673300. The cubic root of 72974890 is about 417.8859948701.

The spelling of 72974890 in words is "seventy-two million, nine hundred seventy-four thousand, eight hundred ninety".