977220612 has 36 divisors (see below), whose sum is σ = 2561687856. Its totient is φ = 325739880.

The previous prime is 977220611. The next prime is 977220613. The reversal of 977220612 is 216022779.

It is an interprime number because it is at equal distance from previous prime (977220611) and next prime (977220613).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (977220611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501714 + ... + 503657.

It is an arithmetic number, because the mean of its divisors is an integer number (71157996).

Almost surely, 2^977220612 is an apocalyptic number.

It is an amenable number.

977220612 is an abundant number, since it is smaller than the sum of its proper divisors (1584467244).

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

977220612 is a wasteful number, since it uses less digits than its factorization.

977220612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005390 (or 1005376 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 977220612 is about 31260.5280185732. The cubic root of 977220612 is about 992.3484741404.

The spelling of 977220612 in words is "nine hundred seventy-seven million, two hundred twenty thousand, six hundred twelve".