1401631452 has 120 divisors (see below), whose sum is σ = 3991402800. Its totient is φ = 426311424.

The previous prime is 1401631423. The next prime is 1401631507. The reversal of 1401631452 is 2541361041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 372999 + ... + 376737.

It is an arithmetic number, because the mean of its divisors is an integer number (33261690).

Almost surely, 2^1401631452 is an apocalyptic number.

1401631452 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 1401631452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1995701400).

1401631452 is an abundant number, since it is smaller than the sum of its proper divisors (2589771348).

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

1401631452 is a wasteful number, since it uses less digits than its factorization.

1401631452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857 (or 3846 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1401631452 is about 37438.3687144619. The cubic root of 1401631452 is about 1119.1233179938.

Adding to 1401631452 its reverse (2541361041), we get a palindrome (3942992493).

The spelling of 1401631452 in words is "one billion, four hundred one million, six hundred thirty-one thousand, four hundred fifty-two".