72969870 has 32 divisors (see below), whose sum is σ = 178435872. Its totient is φ = 19091072.

The previous prime is 72969859. The next prime is 72969881. The reversal of 72969870 is 7896927.

It is an interprime number because it is at equal distance from previous prime (72969859) and next prime (72969881).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21357 + ... + 24536.

It is an arithmetic number, because the mean of its divisors is an integer number (5576121).

Almost surely, 2^72969870 is an apocalyptic number.

72969870 is an abundant number, since it is smaller than the sum of its proper divisors (105466002).

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

72969870 is a wasteful number, since it uses less digits than its factorization.

72969870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45956.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 72969870 is about 8542.2403384592. The cubic root of 72969870 is about 417.8764124151.

The spelling of 72969870 in words is "seventy-two million, nine hundred sixty-nine thousand, eight hundred seventy".