2539740 has 48 divisors (see below), whose sum is σ = 8128512. Its totient is φ = 580416.

The previous prime is 2539699. The next prime is 2539753. The reversal of 2539740 is 479352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2539698 and 2539707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2^2539740 is an apocalyptic number.

2539740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539740 is an abundant number, since it is smaller than the sum of its proper divisors (5588772).

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

2539740 is a wasteful number, since it uses less digits than its factorization.

2539740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066 (or 6064 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 2539740 is about 1593.6561737087. The cubic root of 2539740 is about 136.4362433537.

The spelling of 2539740 in words is "two million, five hundred thirty-nine thousand, seven hundred forty".