978550740 has 48 divisors (see below), whose sum is σ = 3044381760. Its totient is φ = 260946720.

The previous prime is 978550739. The next prime is 978550823. The reversal of 978550740 is 47055879.

978550740 is a `hidden beast` number, since 97 + 8 + 550 + 7 + 4 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905526 + ... + 906605.

It is an arithmetic number, because the mean of its divisors is an integer number (63424620).

Almost surely, 2^978550740 is an apocalyptic number.

978550740 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

978550740 is an abundant number, since it is smaller than the sum of its proper divisors (2065831020).

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

978550740 is a wasteful number, since it uses less digits than its factorization.

978550740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812149 (or 1812141 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 978550740 is about 31281.7956645714. The cubic root of 978550740 is about 992.7985096974.

The spelling of 978550740 in words is "nine hundred seventy-eight million, five hundred fifty thousand, seven hundred forty".