16977768 has 16 divisors (see below), whose sum is σ = 42444480. Its totient is φ = 5659248.

The previous prime is 16977767. The next prime is 16977769. The reversal of 16977768 is 86777961.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16977767) and next prime (16977769).

It is a self number, because there is not a number n which added to its sum of digits gives 16977768.

It is not an unprimeable number, because it can be changed into a prime (16977761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353680 + ... + 353727.

It is an arithmetic number, because the mean of its divisors is an integer number (2652780).

Almost surely, 2^16977768 is an apocalyptic number.

It is an amenable number.

16977768 is an abundant number, since it is smaller than the sum of its proper divisors (25466712).

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

16977768 is a wasteful number, since it uses less digits than its factorization.

16977768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707416 (or 707412 counting only the distinct ones).

The product of its digits is 889056, while the sum is 51.

The square root of 16977768 is about 4120.4087175910. The cubic root of 16977768 is about 257.0160224584.

The spelling of 16977768 in words is "sixteen million, nine hundred seventy-seven thousand, seven hundred sixty-eight".