390889379448 has 80 divisors (see below), whose sum is σ = 1095530558760. Its totient is φ = 130215729600.

The previous prime is 390889379443. The next prime is 390889379471. The reversal of 390889379448 is 844973988093.

390889379448 is a `hidden beast` number, since 3 + 90 + 8 + 8 + 93 + 7 + 9 + 448 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390889379443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 864343 + ... + 1236473.

Almost surely, 2^390889379448 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 390889379448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547765279380).

390889379448 is an abundant number, since it is smaller than the sum of its proper divisors (704641179312).

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

390889379448 is a wasteful number, since it uses less digits than its factorization.

390889379448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373770 (or 373757 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 390889379448 in words is "three hundred ninety billion, eight hundred eighty-nine million, three hundred seventy-nine thousand, four hundred forty-eight".