992399820 has 48 divisors (see below), whose sum is σ = 2942176608. Its totient is φ = 249072640.

The previous prime is 992399797. The next prime is 992399831. The reversal of 992399820 is 28993299.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 485451 + ... + 487490.

It is an arithmetic number, because the mean of its divisors is an integer number (61295346).

Almost surely, 2^992399820 is an apocalyptic number.

It is an amenable number.

992399820 is an abundant number, since it is smaller than the sum of its proper divisors (1949776788).

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

992399820 is a wasteful number, since it uses less digits than its factorization.

992399820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972970 (or 972968 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 992399820 is about 31502.3780054776. The cubic root of 992399820 is about 997.4601613476.

The spelling of 992399820 in words is "nine hundred ninety-two million, three hundred ninety-nine thousand, eight hundred twenty".