1401389004 has 72 divisors (see below), whose sum is σ = 3510198720. Its totient is φ = 434963808.

The previous prime is 1401388987. The next prime is 1401389009. The reversal of 1401389004 is 4009831041.

It is a happy number.

It is a super-2 number, since 2×1401389004² = 3927782281064224032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1401389009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252847 + ... + 258329.

It is an arithmetic number, because the mean of its divisors is an integer number (48752760).

Almost surely, 2^1401389004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401389004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755099360).

1401389004 is an abundant number, since it is smaller than the sum of its proper divisors (2108809716).

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

1401389004 is a wasteful number, since it uses less digits than its factorization.

1401389004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1401389004 is about 37435.1306128348. The cubic root of 1401389004 is about 1119.0587872747.

The spelling of 1401389004 in words is "one billion, four hundred one million, three hundred eighty-nine thousand, four".