1201679388 has 240 divisors, whose sum is σ = 3944445120. Its totient is φ = 310542336.

The previous prime is 1201679363. The next prime is 1201679389. The reversal of 1201679388 is 8839761021.

1201679388 is a `hidden beast` number, since 1 + 201 + 67 + 9 + 388 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201679389) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1562268 + ... + 1563036.

It is an arithmetic number, because the mean of its divisors is an integer number (16435188).

Almost surely, 2^1201679388 is an apocalyptic number.

1201679388 is a gapful number since it is divisible by the number (18) 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 1201679388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972222560).

1201679388 is an abundant number, since it is smaller than the sum of its proper divisors (2742765732).

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

1201679388 is a wasteful number, since it uses less digits than its factorization.

1201679388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 847 counting only the distinct ones).

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

The square root of 1201679388 is about 34665.2475542870. The cubic root of 1201679388 is about 1063.1540647877.

The spelling of 1201679388 in words is "one billion, two hundred one million, six hundred seventy-nine thousand, three hundred eighty-eight".