1154220720 has 40 divisors (see below), whose sum is σ = 3578084976. Its totient is φ = 307792128.

The previous prime is 1154220719. The next prime is 1154220761. The reversal of 1154220720 is 270224511.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2404387 + ... + 2404866.

Almost surely, 2^1154220720 is an apocalyptic number.

1154220720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154220720 is an abundant number, since it is smaller than the sum of its proper divisors (2423864256).

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

1154220720 is a wasteful number, since it uses less digits than its factorization.

1154220720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809269 (or 4809263 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1154220720 is about 33973.8240414587. The cubic root of 1154220720 is about 1048.9697286463.

The spelling of 1154220720 in words is "one billion, one hundred fifty-four million, two hundred twenty thousand, seven hundred twenty".