981777020 has 48 divisors (see below), whose sum is σ = 2437525440. Its totient is φ = 325000704.

The previous prime is 981776993. The next prime is 981777053. The reversal of 981777020 is 20777189.

It is a super-2 number, since 2×981777020² = 1927772234000160800, which contains 22 as substring.

It is a congruent number.

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, 116849 + ... + 124968.

It is an arithmetic number, because the mean of its divisors is an integer number (50781780).

Almost surely, 2^981777020 is an apocalyptic number.

It is an amenable number.

981777020 is an abundant number, since it is smaller than the sum of its proper divisors (1455748420).

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

981777020 is a wasteful number, since it uses less digits than its factorization.

981777020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241862 (or 241860 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 981777020 is about 31333.3212411324. The cubic root of 981777020 is about 993.8883977441. Note that the first 3 decimals are identical.

The spelling of 981777020 in words is "nine hundred eighty-one million, seven hundred seventy-seven thousand, twenty".