1540897136 has 60 divisors (see below), whose sum is σ = 3281080920. Its totient is φ = 700062720.

The previous prime is 1540897109. The next prime is 1540897199. The reversal of 1540897136 is 6317980451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128351 + ... + 139841.

It is an arithmetic number, because the mean of its divisors is an integer number (54684682).

Almost surely, 2^1540897136 is an apocalyptic number.

1540897136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540897136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640540460).

1540897136 is an abundant number, since it is smaller than the sum of its proper divisors (1740183784).

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

1540897136 is a wasteful number, since it uses less digits than its factorization.

1540897136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11562 (or 11539 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1540897136 is about 39254.2626475138. The cubic root of 1540897136 is about 1155.0245519915.

The spelling of 1540897136 in words is "one billion, five hundred forty million, eight hundred ninety-seven thousand, one hundred thirty-six".