1149904728 has 64 divisors (see below), whose sum is σ = 3650496000. Its totient is φ = 328543776.

The previous prime is 1149904703. The next prime is 1149904729. The reversal of 1149904728 is 8274099411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149904729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378748 + ... + 381771.

It is an arithmetic number, because the mean of its divisors is an integer number (57039000).

Almost surely, 2^1149904728 is an apocalyptic number.

1149904728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1149904728 is an abundant number, since it is smaller than the sum of its proper divisors (2500591272).

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

1149904728 is a wasteful number, since it uses less digits than its factorization.

1149904728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760541 (or 760531 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1149904728 is about 33910.2451775271. The cubic root of 1149904728 is about 1047.6606203497.

The spelling of 1149904728 in words is "one billion, one hundred forty-nine million, nine hundred four thousand, seven hundred twenty-eight".