147779920 has 40 divisors (see below), whose sum is σ = 344627496. Its totient is φ = 58933248.

The previous prime is 147779917. The next prime is 147779941. The reversal of 147779920 is 29977741.

It can be written as a sum of positive squares in 4 ways, for example, as 43086096 + 104693824 = 6564^2 + 10232^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25624 + ... + 30856.

Almost surely, 2^147779920 is an apocalyptic number.

147779920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147779920 is an abundant number, since it is smaller than the sum of its proper divisors (196847576).

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

147779920 is a wasteful number, since it uses less digits than its factorization.

147779920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599 (or 5593 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 147779920 is about 12156.4764631862. The cubic root of 147779920 is about 528.6949259592.

The spelling of 147779920 in words is "one hundred forty-seven million, seven hundred seventy-nine thousand, nine hundred twenty".