392242578 has 96 divisors (see below), whose sum is σ = 985424256. Its totient is φ = 101896704.

The previous prime is 392242577. The next prime is 392242579. The reversal of 392242578 is 875242293.

It is an interprime number because it is at equal distance from previous prime (392242577) and next prime (392242579).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (392242573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 517776 + ... + 518532.

It is an arithmetic number, because the mean of its divisors is an integer number (10264836).

Almost surely, 2^392242578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 392242578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492712128).

392242578 is an abundant number, since it is smaller than the sum of its proper divisors (593181678).

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

392242578 is a wasteful number, since it uses less digits than its factorization.

392242578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 855 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 392242578 is about 19805.1149453872. The cubic root of 392242578 is about 732.0120746612.

The spelling of 392242578 in words is "three hundred ninety-two million, two hundred forty-two thousand, five hundred seventy-eight".