390011621 has 8 divisors (see below), whose sum is σ = 409899840. Its totient is φ = 370367712.

The previous prime is 390011599. The next prime is 390011641. The reversal of 390011621 is 126110093.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-390011621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390011641) 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, 57800 + ... + 64193.

It is an arithmetic number, because the mean of its divisors is an integer number (51237480).

Almost surely, 2^390011621 is an apocalyptic number.

It is an amenable number.

390011621 is a deficient number, since it is larger than the sum of its proper divisors (19888219).

390011621 is a wasteful number, since it uses less digits than its factorization.

390011621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122155.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 390011621 is about 19748.7118820444. The cubic root of 390011621 is about 730.6216141457.

The spelling of 390011621 in words is "three hundred ninety million, eleven thousand, six hundred twenty-one".