147997440 has 216 divisors, whose sum is σ = 530908560. Its totient is φ = 38019072.

The previous prime is 147997363. The next prime is 147997453. The reversal of 147997440 is 44799741.

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 23 ways as a sum of consecutive naturals, for example, 333859 + ... + 334301.

It is an arithmetic number, because the mean of its divisors is an integer number (2457910).

Almost surely, 2^147997440 is an apocalyptic number.

147997440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 147997440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265454280).

147997440 is an abundant number, since it is smaller than the sum of its proper divisors (382911120).

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

147997440 is a wasteful number, since it uses less digits than its factorization.

147997440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 147997440 is about 12165.4198447896. The cubic root of 147997440 is about 528.9541974082.

The spelling of 147997440 in words is "one hundred forty-seven million, nine hundred ninety-seven thousand, four hundred forty".