2138690 has 16 divisors (see below), whose sum is σ = 3974400. Its totient is φ = 827760.

The previous prime is 2138687. The next prime is 2138693. The reversal of 2138690 is 968312.

It is an interprime number because it is at equal distance from previous prime (2138687) and next prime (2138693).

It is a super-2 number, since 2×2138690² = 9147989832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2138693) 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, 3140 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (248400).

2^2138690 is an apocalyptic number.

2138690 is a deficient number, since it is larger than the sum of its proper divisors (1835710).

2138690 is a wasteful number, since it uses less digits than its factorization.

2138690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2138690 is about 1462.4260665073. The cubic root of 2138690 is about 128.8395738253.

The spelling of 2138690 in words is "two million, one hundred thirty-eight thousand, six hundred ninety".