980408391 has 24 divisors (see below), whose sum is σ = 1350754560. Its totient is φ = 632247552.

The previous prime is 980408389. The next prime is 980408413. The reversal of 980408391 is 193804089.

It is not a de Polignac number, because 980408391 - 2¹ = 980408389 is a prime.

It is a super-2 number, since 2×980408391² = 1922401226286417762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980408321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1326300 + ... + 1327038.

It is an arithmetic number, because the mean of its divisors is an integer number (56281440).

Almost surely, 2^980408391 is an apocalyptic number.

980408391 is a deficient number, since it is larger than the sum of its proper divisors (370346169).

980408391 is an equidigital number, since it uses as much as digits as its factorization.

980408391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 980408391 is about 31311.4737915672. The cubic root of 980408391 is about 993.4263454211.

The spelling of 980408391 in words is "nine hundred eighty million, four hundred eight thousand, three hundred ninety-one".