398820023 has 16 divisors (see below), whose sum is σ = 476444160. Its totient is φ = 326410656.

The previous prime is 398819989. The next prime is 398820029. The reversal of 398820023 is 320028893.

It is a cyclic number.

It is not a de Polignac number, because 398820023 - 2⁸ = 398819767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398820029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107168 + ... + 110826.

It is an arithmetic number, because the mean of its divisors is an integer number (29777760).

Almost surely, 2^398820023 is an apocalyptic number.

398820023 is a deficient number, since it is larger than the sum of its proper divisors (77624137).

398820023 is a wasteful number, since it uses less digits than its factorization.

398820023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 398820023 is about 19970.4787874502. The cubic root of 398820023 is about 736.0810740626.

The spelling of 398820023 in words is "three hundred ninety-eight million, eight hundred twenty thousand, twenty-three".