16779940 has 24 divisors (see below), whose sum is σ = 35989632. Its totient is φ = 6568800.

The previous prime is 16779937. The next prime is 16779943. The reversal of 16779940 is 4997761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16779937) and next prime (16779943).

It is not an unprimeable number, because it can be changed into a prime (16779943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7986 + ... + 9865.

It is an arithmetic number, because the mean of its divisors is an integer number (1499568).

Almost surely, 2^16779940 is an apocalyptic number.

16779940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16779940 is an abundant number, since it is smaller than the sum of its proper divisors (19209692).

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

16779940 is a wasteful number, since it uses less digits than its factorization.

16779940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17907 (or 17905 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 16779940 is about 4096.3325060351. The cubic root of 16779940 is about 256.0138542307.

The spelling of 16779940 in words is "sixteen million, seven hundred seventy-nine thousand, nine hundred forty".