398197536 has 192 divisors, whose sum is σ = 1191407616. Its totient is φ = 115404800.

The previous prime is 398197507. The next prime is 398197537. The reversal of 398197536 is 635791893.

It is a super-2 number, since 2×398197536² = 317122555352942592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398197537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3523816 + ... + 3523928.

It is an arithmetic number, because the mean of its divisors is an integer number (6205248).

Almost surely, 2^398197536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398197536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595703808).

398197536 is an abundant number, since it is smaller than the sum of its proper divisors (793210080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398197536 is a wasteful number, since it uses less digits than its factorization.

398197536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 247 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 398197536 is about 19954.8875216073. The cubic root of 398197536 is about 735.6979108394.

The spelling of 398197536 in words is "three hundred ninety-eight million, one hundred ninety-seven thousand, five hundred thirty-six".