1401438764 has 24 divisors (see below), whose sum is σ = 2683441488. Its totient is φ = 635120640.

The previous prime is 1401438763. The next prime is 1401438811. The reversal of 1401438764 is 4678341041.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1401438763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32429 + ... + 62084.

It is an arithmetic number, because the mean of its divisors is an integer number (111810062).

Almost surely, 2^1401438764 is an apocalyptic number.

It is an amenable number.

1401438764 is a deficient number, since it is larger than the sum of its proper divisors (1282002724).

1401438764 is a wasteful number, since it uses less digits than its factorization.

1401438764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94865 (or 94863 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 1401438764 is about 37435.7952232886. The cubic root of 1401438764 is about 1119.0720321592.

The spelling of 1401438764 in words is "one billion, four hundred one million, four hundred thirty-eight thousand, seven hundred sixty-four".