2539490440 has 32 divisors (see below), whose sum is σ = 5752215000. Its totient is φ = 1008976384.

The previous prime is 2539490423. The next prime is 2539490461. The reversal of 2539490440 is 440949352.

It can be written as a sum of positive squares in 4 ways, for example, as 1425666564 + 1113823876 = 37758^2 + 33374^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2539490393 and 2539490402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207085 + ... + 219004.

Almost surely, 2^2539490440 is an apocalyptic number.

2539490440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539490440 is an abundant number, since it is smaller than the sum of its proper divisors (3212724560).

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

2539490440 is a wasteful number, since it uses less digits than its factorization.

2539490440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426249 (or 426245 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2539490440 is about 50393.3571019038. The cubic root of 2539490440 is about 1364.3177437334.

The spelling of 2539490440 in words is "two billion, five hundred thirty-nine million, four hundred ninety thousand, four hundred forty".