77012292 has 48 divisors (see below), whose sum is σ = 207011840. Its totient is φ = 21827232.

The previous prime is 77012291. The next prime is 77012311. The reversal of 77012292 is 29221077.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77012291) 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, 7059 + ... + 14277.

Almost surely, 2^77012292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77012292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103505920).

77012292 is an abundant number, since it is smaller than the sum of its proper divisors (129999548).

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

77012292 is a wasteful number, since it uses less digits than its factorization.

77012292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7360 (or 7358 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 77012292 is about 8775.6647611449. The cubic root of 77012292 is about 425.4547234507.

The spelling of 77012292 in words is "seventy-seven million, twelve thousand, two hundred ninety-two".