76720290 has 32 divisors (see below), whose sum is σ = 193821120. Its totient is φ = 19381824.

The previous prime is 76720253. The next prime is 76720291. The reversal of 76720290 is 9202767.

It is not an unprimeable number, because it can be changed into a prime (76720291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66729 + ... + 67868.

It is an arithmetic number, because the mean of its divisors is an integer number (6056910).

Almost surely, 2^76720290 is an apocalyptic number.

76720290 is an abundant number, since it is smaller than the sum of its proper divisors (117100830).

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

76720290 is a wasteful number, since it uses less digits than its factorization.

76720290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134626.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 76720290 is about 8759.0119305776. The cubic root of 76720290 is about 424.9163203186.

The spelling of 76720290 in words is "seventy-six million, seven hundred twenty thousand, two hundred ninety".