1154742440 has 16 divisors (see below), whose sum is σ = 2598170580. Its totient is φ = 461896960.

The previous prime is 1154742431. The next prime is 1154742469. The reversal of 1154742440 is 442474511.

It can be written as a sum of positive squares in 2 ways, for example, as 1027458916 + 127283524 = 32054^2 + 11282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1154742397 and 1154742406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14434241 + ... + 14434320.

Almost surely, 2^1154742440 is an apocalyptic number.

1154742440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154742440 is an abundant number, since it is smaller than the sum of its proper divisors (1443428140).

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

1154742440 is a wasteful number, since it uses less digits than its factorization.

1154742440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28868572 (or 28868568 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 1154742440 is about 33981.5014382826. The cubic root of 1154742440 is about 1049.1277533178.

The spelling of 1154742440 in words is "one billion, one hundred fifty-four million, seven hundred forty-two thousand, four hundred forty".