402023398 has 16 divisors (see below), whose sum is σ = 690518304. Its totient is φ = 171961920.

The previous prime is 402023393. The next prime is 402023449. The reversal of 402023398 is 893320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402023393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20265 + ... + 34852.

It is an arithmetic number, because the mean of its divisors is an integer number (43157394).

Almost surely, 2^402023398 is an apocalyptic number.

402023398 is a deficient number, since it is larger than the sum of its proper divisors (288494906).

402023398 is a wasteful number, since it uses less digits than its factorization.

402023398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55647.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 402023398 is about 20050.5211403594. The cubic root of 402023398 is about 738.0465877372.

The spelling of 402023398 in words is "four hundred two million, twenty-three thousand, three hundred ninety-eight".