1401642312 has 128 divisors (see below), whose sum is σ = 4231219200. Its totient is φ = 377975808.

The previous prime is 1401642301. The next prime is 1401642317. The reversal of 1401642312 is 2132461041.

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

It is not an unprimeable number, because it can be changed into a prime (1401642317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1075053 + ... + 1076355.

It is an arithmetic number, because the mean of its divisors is an integer number (33056400).

Almost surely, 2^1401642312 is an apocalyptic number.

1401642312 is a gapful number since it is divisible by the number (12) 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 1401642312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115609600).

1401642312 is an abundant number, since it is smaller than the sum of its proper divisors (2829576888).

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

1401642312 is a wasteful number, since it uses less digits than its factorization.

1401642312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1401642312 is about 37438.5137525517. The cubic root of 1401642312 is about 1119.1262083512.

The spelling of 1401642312 in words is "one billion, four hundred one million, six hundred forty-two thousand, three hundred twelve".