398286709440 has 56 divisors (see below), whose sum is σ = 1264560305520. Its totient is φ = 106209788928.

The previous prime is 398286709423. The next prime is 398286709493. The reversal of 398286709440 is 44907682893.

It is a super-2 number, since 2×398286709440² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 207440035 + ... + 207441954.

Almost surely, 2^398286709440 is an apocalyptic number.

398286709440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398286709440 is an abundant number, since it is smaller than the sum of its proper divisors (866273596080).

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

398286709440 is a wasteful number, since it uses less digits than its factorization.

398286709440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414882009 (or 414881999 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 398286709440 in words is "three hundred ninety-eight billion, two hundred eighty-six million, seven hundred nine thousand, four hundred forty".