2400739 has 4 divisors (see below), whose sum is σ = 2619000. Its totient is φ = 2182480.

The previous prime is 2400719. The next prime is 2400767. The reversal of 2400739 is 9370042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2400739 - 2¹³ = 2392547 is a prime.

It is a super-2 number, since 2×2400739² = 11527095492242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2400709) 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, 109114 + ... + 109135.

It is an arithmetic number, because the mean of its divisors is an integer number (654750).

2^2400739 is an apocalyptic number.

2400739 is a deficient number, since it is larger than the sum of its proper divisors (218261).

2400739 is a wasteful number, since it uses less digits than its factorization.

2400739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218260.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2400739 is about 1549.4318313498. The cubic root of 2400739 is about 133.9003305771.

The spelling of 2400739 in words is "two million, four hundred thousand, seven hundred thirty-nine".