2390661 has 48 divisors (see below), whose sum is σ = 4468800. Its totient is φ = 1251936.

The previous prime is 2390653. The next prime is 2390699. The reversal of 2390661 is 1660932.

It is a happy number.

It is not a de Polignac number, because 2390661 - 2³ = 2390653 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2390611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17130 + ... + 17268.

It is an arithmetic number, because the mean of its divisors is an integer number (93100).

2^2390661 is an apocalyptic number.

2390661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2390661 is a deficient number, since it is larger than the sum of its proper divisors (2078139).

2390661 is a wasteful number, since it uses less digits than its factorization.

2390661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2390661 is about 1546.1762512728. The cubic root of 2390661 is about 133.7127022096.

The spelling of 2390661 in words is "two million, three hundred ninety thousand, six hundred sixty-one".