162779440 has 20 divisors (see below), whose sum is σ = 378462384. Its totient is φ = 65111744.

The previous prime is 162779423. The next prime is 162779453. The reversal of 162779440 is 44977261.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 162779393 and 162779402.

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 3 ways as a sum of consecutive naturals, for example, 1017292 + ... + 1017451.

Almost surely, 2^162779440 is an apocalyptic number.

162779440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162779440 is an abundant number, since it is smaller than the sum of its proper divisors (215682944).

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

162779440 is a wasteful number, since it uses less digits than its factorization.

162779440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034756 (or 2034750 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 162779440 is about 12758.5046145698. The cubic root of 162779440 is about 546.0090611993.

The spelling of 162779440 in words is "one hundred sixty-two million, seven hundred seventy-nine thousand, four hundred forty".