977783020 has 48 divisors (see below), whose sum is σ = 2122087968. Its totient is φ = 378201600.

The previous prime is 977783003. The next prime is 977783039. The reversal of 977783020 is 20387779.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 81232 + ... + 92488.

It is an arithmetic number, because the mean of its divisors is an integer number (44210166).

Almost surely, 2^977783020 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 977783020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061043984).

977783020 is an abundant number, since it is smaller than the sum of its proper divisors (1144304948).

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

977783020 is a wasteful number, since it uses less digits than its factorization.

977783020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11410 (or 11408 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 977783020 is about 31269.5222221255. The cubic root of 977783020 is about 992.5388090834.

The spelling of 977783020 in words is "nine hundred seventy-seven million, seven hundred eighty-three thousand, twenty".