978019490 has 64 divisors (see below), whose sum is σ = 2190931200. Its totient is φ = 306706176.

The previous prime is 978019481. The next prime is 978019499. The reversal of 978019490 is 94910879.

It is an interprime number because it is at equal distance from previous prime (978019481) and next prime (978019499).

It is not an unprimeable number, because it can be changed into a prime (978019499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25892 + ... + 51248.

It is an arithmetic number, because the mean of its divisors is an integer number (34233300).

Almost surely, 2^978019490 is an apocalyptic number.

978019490 is an abundant number, since it is smaller than the sum of its proper divisors (1212911710).

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

978019490 is a wasteful number, since it uses less digits than its factorization.

978019490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25419.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 978019490 is about 31273.3031514101. The cubic root of 978019490 is about 992.6188154956.

The spelling of 978019490 in words is "nine hundred seventy-eight million, nineteen thousand, four hundred ninety".