2457381540 has 24 divisors (see below), whose sum is σ = 6880668480. Its totient is φ = 655301728.

The previous prime is 2457381491. The next prime is 2457381557. The reversal of 2457381540 is 451837542.

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, 20478120 + ... + 20478239.

It is an arithmetic number, because the mean of its divisors is an integer number (286694520).

Almost surely, 2^2457381540 is an apocalyptic number.

2457381540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2457381540 is an abundant number, since it is smaller than the sum of its proper divisors (4423286940).

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

2457381540 is a wasteful number, since it uses less digits than its factorization.

2457381540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40956371 (or 40956369 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 2457381540 is about 49571.9834180558. The cubic root of 2457381540 is about 1349.4522771217.

The spelling of 2457381540 in words is "two billion, four hundred fifty-seven million, three hundred eighty-one thousand, five hundred forty".