978611490 has 64 divisors (see below), whose sum is σ = 2612373120. Its totient is φ = 260688960.

The previous prime is 978611479. The next prime is 978611507. The reversal of 978611490 is 94116879.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 505825 + ... + 507755.

It is an arithmetic number, because the mean of its divisors is an integer number (40818330).

Almost surely, 2^978611490 is an apocalyptic number.

978611490 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

978611490 is an abundant number, since it is smaller than the sum of its proper divisors (1633761630).

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

978611490 is a wasteful number, since it uses less digits than its factorization.

978611490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3818 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 978611490 is about 31282.7666615343. The cubic root of 978611490 is about 992.8190541137.

The spelling of 978611490 in words is "nine hundred seventy-eight million, six hundred eleven thousand, four hundred ninety".