398621002 has 16 divisors (see below), whose sum is σ = 664699392. Its totient is φ = 178043760.

The previous prime is 398620991. The next prime is 398621023. The reversal of 398621002 is 200126893.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246478 + ... + 248089.

It is an arithmetic number, because the mean of its divisors is an integer number (41543712).

Almost surely, 2^398621002 is an apocalyptic number.

398621002 is a deficient number, since it is larger than the sum of its proper divisors (266078390).

398621002 is a wasteful number, since it uses less digits than its factorization.

398621002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494613.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 398621002 is about 19965.4952856171. The cubic root of 398621002 is about 735.9586128370.

Adding to 398621002 its reverse (200126893), we get a palindrome (598747895).

The spelling of 398621002 in words is "three hundred ninety-eight million, six hundred twenty-one thousand, two".