147771440 has 20 divisors (see below), whose sum is σ = 343568784. Its totient is φ = 59108544.

The previous prime is 147771439. The next prime is 147771479. The reversal of 147771440 is 44177741.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 147771440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923492 + ... + 923651.

Almost surely, 2^147771440 is an apocalyptic number.

147771440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147771440 is an abundant number, since it is smaller than the sum of its proper divisors (195797344).

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

147771440 is a wasteful number, since it uses less digits than its factorization.

147771440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847156 (or 1847150 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 147771440 is about 12156.1276729064. The cubic root of 147771440 is about 528.6848131312.

The spelling of 147771440 in words is "one hundred forty-seven million, seven hundred seventy-one thousand, four hundred forty".