1201388770 has 16 divisors (see below), whose sum is σ = 2170146240. Its totient is φ = 478856304.

The previous prime is 1201388743. The next prime is 1201388777. The reversal of 1201388770 is 778831021.

It is a super-2 number, since 2×1201388770² = 2886669953364225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201388777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209430 + ... + 215089.

It is an arithmetic number, because the mean of its divisors is an integer number (135634140).

Almost surely, 2^1201388770 is an apocalyptic number.

1201388770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201388770 is a deficient number, since it is larger than the sum of its proper divisors (968757470).

1201388770 is a wasteful number, since it uses less digits than its factorization.

1201388770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424809.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1201388770 is about 34661.0555234546. The cubic root of 1201388770 is about 1063.0683523473.

The spelling of 1201388770 in words is "one billion, two hundred one million, three hundred eighty-eight thousand, seven hundred seventy".