392849820 has 72 divisors (see below), whose sum is σ = 1299982320. Its totient is φ = 95235840.

The previous prime is 392849813. The next prime is 392849837. The reversal of 392849820 is 28948293.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97225 + ... + 101184.

It is an arithmetic number, because the mean of its divisors is an integer number (18055310).

Almost surely, 2^392849820 is an apocalyptic number.

392849820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

392849820 is an abundant number, since it is smaller than the sum of its proper divisors (907132500).

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

392849820 is a wasteful number, since it uses less digits than its factorization.

392849820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198435 (or 198430 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 392849820 is about 19820.4394502241. The cubic root of 392849820 is about 732.3896295323.

The spelling of 392849820 in words is "three hundred ninety-two million, eight hundred forty-nine thousand, eight hundred twenty".