163247440 has 20 divisors (see below), whose sum is σ = 379550484. Its totient is φ = 65298944.

The previous prime is 163247431. The next prime is 163247453. The reversal of 163247440 is 44742361.

It can be written as a sum of positive squares in 2 ways, for example, as 45481536 + 117765904 = 6744^2 + 10852^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020217 + ... + 1020376.

Almost surely, 2^163247440 is an apocalyptic number.

163247440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163247440 is an abundant number, since it is smaller than the sum of its proper divisors (216303044).

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

163247440 is a wasteful number, since it uses less digits than its factorization.

163247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040606 (or 2040600 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 163247440 is about 12776.8321582464. The cubic root of 163247440 is about 546.5318293925.

The spelling of 163247440 in words is "one hundred sixty-three million, two hundred forty-seven thousand, four hundred forty".