147978738 has 96 divisors (see below), whose sum is σ = 348444096. Its totient is φ = 47029248.

The previous prime is 147978713. The next prime is 147978739. The reversal of 147978738 is 837879741.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (147978739) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1525506 + ... + 1525602.

It is an arithmetic number, because the mean of its divisors is an integer number (3629626).

Almost surely, 2^147978738 is an apocalyptic number.

147978738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 147978738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174222048).

147978738 is an abundant number, since it is smaller than the sum of its proper divisors (200465358).

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

147978738 is an equidigital number, since it uses as much as digits as its factorization.

147978738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 218 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 147978738 is about 12164.6511663919. The cubic root of 147978738 is about 528.9319156757.

The spelling of 147978738 in words is "one hundred forty-seven million, nine hundred seventy-eight thousand, seven hundred thirty-eight".