978359940 has 36 divisors (see below), whose sum is σ = 2967692364. Its totient is φ = 260895936.

The previous prime is 978359933. The next prime is 978359959. The reversal of 978359940 is 49953879.

978359940 is a `hidden beast` number, since 9 + 7 + 8 + 3 + 599 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 345736836 + 632623104 = 18594^2 + 25152^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2717487 + ... + 2717846.

It is an arithmetic number, because the mean of its divisors is an integer number (82435899).

Almost surely, 2^978359940 is an apocalyptic number.

978359940 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

978359940 is an abundant number, since it is smaller than the sum of its proper divisors (1989332424).

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

978359940 is a wasteful number, since it uses less digits than its factorization.

978359940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435348 (or 5435343 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 978359940 is about 31278.7458188464. The cubic root of 978359940 is about 992.7339794825.

The spelling of 978359940 in words is "nine hundred seventy-eight million, three hundred fifty-nine thousand, nine hundred forty".