1011198720 has 144 divisors (see below), whose sum is σ = 3690973440. Its totient is φ = 231124992.

The previous prime is 1011198719. The next prime is 1011198731. The reversal of 1011198720 is 278911101.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8071 + ... + 45689.

It is an arithmetic number, because the mean of its divisors is an integer number (25631760).

Almost surely, 2^1011198720 is an apocalyptic number.

1011198720 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 1011198720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1845486720).

1011198720 is an abundant number, since it is smaller than the sum of its proper divisors (2679774720).

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

1011198720 is an equidigital number, since it uses as much as digits as its factorization.

1011198720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37650 (or 37636 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 1011198720 is about 31799.3509367723. The cubic root of 1011198720 is about 1003.7190581267.

The spelling of 1011198720 in words is "one billion, eleven million, one hundred ninety-eight thousand, seven hundred twenty".