72942140 has 24 divisors (see below), whose sum is σ = 161241360. Its totient is φ = 27641088.

The previous prime is 72942127. The next prime is 72942161. The reversal of 72942140 is 4124927.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95597 + ... + 96356.

It is an arithmetic number, because the mean of its divisors is an integer number (6718390).

Almost surely, 2^72942140 is an apocalyptic number.

It is an amenable number.

72942140 is an abundant number, since it is smaller than the sum of its proper divisors (88299220).

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

72942140 is a wasteful number, since it uses less digits than its factorization.

72942140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191981 (or 191979 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72942140 is about 8540.6170737248. The cubic root of 72942140 is about 417.8234719294.

The spelling of 72942140 in words is "seventy-two million, nine hundred forty-two thousand, one hundred forty".