1154687940 has 432 divisors, whose sum is σ = 4468544640. Its totient is φ = 246758400.

The previous prime is 1154687899. The next prime is 1154688001. The reversal of 1154687940 is 497864511.

1154687940 is a `hidden beast` number, since 11 + 546 + 8 + 7 + 94 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7646865 + ... + 7647015.

Almost surely, 2^1154687940 is an apocalyptic number.

1154687940 is a gapful number since it is divisible by the number (10) 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 1154687940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234272320).

1154687940 is an abundant number, since it is smaller than the sum of its proper divisors (3313856700).

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

1154687940 is a wasteful number, since it uses less digits than its factorization.

1154687940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1154687940 is about 33980.6995219345. The cubic root of 1154687940 is about 1049.1112479454. Note that the first 3 decimals are identical.

The spelling of 1154687940 in words is "one billion, one hundred fifty-four million, six hundred eighty-seven thousand, nine hundred forty".