1540436490 has 24 divisors (see below), whose sum is σ = 4005135108. Its totient is φ = 410783040.

The previous prime is 1540436489. The next prime is 1540436497. The reversal of 1540436490 is 946340451.

1540436490 is a `hidden beast` number, since 1 + 5 + 4 + 0 + 4 + 3 + 649 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1327072041 + 213364449 = 36429^2 + 14607^2 .

It is not an unprimeable number, because it can be changed into a prime (1540436497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8557891 + ... + 8558070.

Almost surely, 2^1540436490 is an apocalyptic number.

1540436490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540436490 is an abundant number, since it is smaller than the sum of its proper divisors (2464698618).

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

1540436490 is a wasteful number, since it uses less digits than its factorization.

1540436490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17115974 (or 17115971 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1540436490 is about 39248.3947442440. The cubic root of 1540436490 is about 1154.9094436227.

The spelling of 1540436490 in words is "one billion, five hundred forty million, four hundred thirty-six thousand, four hundred ninety".