1401487400 has 24 divisors (see below), whose sum is σ = 3258458670. Its totient is φ = 560594880.

The previous prime is 1401487393. The next prime is 1401487403. The reversal of 1401487400 is 47841041.

It can be written as a sum of positive squares in 3 ways, for example, as 1124797444 + 276689956 = 33538^2 + 16634^2 .

It is not an unprimeable number, because it can be changed into a prime (1401487403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3503519 + ... + 3503918.

Almost surely, 2^1401487400 is an apocalyptic number.

1401487400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401487400 is an abundant number, since it is smaller than the sum of its proper divisors (1856971270).

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

1401487400 is a wasteful number, since it uses less digits than its factorization.

1401487400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007453 (or 7007444 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 1401487400 is about 37436.4448098374. Note that the first 3 decimals coincide. The cubic root of 1401487400 is about 1119.0849775596.

The spelling of 1401487400 in words is "one billion, four hundred one million, four hundred eighty-seven thousand, four hundred".