147988978 has 16 divisors (see below), whose sum is σ = 242625024. Its totient is φ = 67394880.

The previous prime is 147988949. The next prime is 147988987. The reversal of 147988978 is 879889741.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69150 + ... + 71257.

It is an arithmetic number, because the mean of its divisors is an integer number (15164064).

Almost surely, 2^147988978 is an apocalyptic number.

147988978 is a deficient number, since it is larger than the sum of its proper divisors (94636046).

147988978 is a wasteful number, since it uses less digits than its factorization.

147988978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140457.

The product of its digits is 8128512, while the sum is 61.

The square root of 147988978 is about 12165.0720507525. The cubic root of 147988978 is about 528.9441159372.

The spelling of 147988978 in words is "one hundred forty-seven million, nine hundred eighty-eight thousand, nine hundred seventy-eight".