989870040 has 48 divisors (see below), whose sum is σ = 3217078800. Its totient is φ = 263965248.

The previous prime is 989870039. The next prime is 989870041. The reversal of 989870040 is 40078989.

It is an interprime number because it is at equal distance from previous prime (989870039) and next prime (989870041).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989870041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1374460 + ... + 1375179.

It is an arithmetic number, because the mean of its divisors is an integer number (67022475).

Almost surely, 2^989870040 is an apocalyptic number.

989870040 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

989870040 is an abundant number, since it is smaller than the sum of its proper divisors (2227208760).

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

989870040 is a wasteful number, since it uses less digits than its factorization.

989870040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749656 (or 2749649 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 989870040 is about 31462.2001773557. The cubic root of 989870040 is about 996.6118802759.

The spelling of 989870040 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, forty".