390078443621 has 8 divisors (see below), whose sum is σ = 401067074688. Its totient is φ = 379160028000.

The previous prime is 390078443551. The next prime is 390078443627. The reversal of 390078443621 is 126344870093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390078443621 - 2³⁰ = 389004701797 is a prime.

It is a super-2 number, since 2×390078443621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390078443627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17542595 + ... + 17564816.

It is an arithmetic number, because the mean of its divisors is an integer number (50133384336).

Almost surely, 2^390078443621 is an apocalyptic number.

It is an amenable number.

390078443621 is a deficient number, since it is larger than the sum of its proper divisors (10988631067).

390078443621 is a wasteful number, since it uses less digits than its factorization.

390078443621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35107723.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 390078443621 in words is "three hundred ninety billion, seventy-eight million, four hundred forty-three thousand, six hundred twenty-one".