1134399978 has 40 divisors (see below), whose sum is σ = 2675687520. Its totient is φ = 358230600.

The previous prime is 1134399961. The next prime is 1134399991. The reversal of 1134399978 is 8799934311.

It is a happy number.

1134399978 is a `hidden beast` number, since 113 + 439 + 9 + 97 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 181198 + ... + 187353.

It is an arithmetic number, because the mean of its divisors is an integer number (66892188).

Almost surely, 2^1134399978 is an apocalyptic number.

1134399978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1134399978 is an abundant number, since it is smaller than the sum of its proper divisors (1541287542).

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

1134399978 is a wasteful number, since it uses less digits than its factorization.

1134399978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368584 (or 368575 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 1134399978 is about 33680.8547694384. The cubic root of 1134399978 is about 1042.9305834795.

The spelling of 1134399978 in words is "one billion, one hundred thirty-four million, three hundred ninety-nine thousand, nine hundred seventy-eight".