16949990 has 16 divisors (see below), whose sum is σ = 30611952. Its totient is φ = 6757344.

The previous prime is 16949953. The next prime is 16949993. The reversal of 16949990 is 9994961.

It is a super-2 number, since 2×16949990² = 574604322000200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16949993) 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, 497 + ... + 5843.

It is an arithmetic number, because the mean of its divisors is an integer number (1913247).

Almost surely, 2^16949990 is an apocalyptic number.

16949990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16949990 is a deficient number, since it is larger than the sum of its proper divisors (13661962).

16949990 is a wasteful number, since it uses less digits than its factorization.

16949990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 16949990 is about 4117.0365555822. The cubic root of 16949990 is about 256.8757745708.

The spelling of 16949990 in words is "sixteen million, nine hundred forty-nine thousand, nine hundred ninety".