1400245720 has 16 divisors (see below), whose sum is σ = 3150552960. Its totient is φ = 560098272.

The previous prime is 1400245709. The next prime is 1400245729. The reversal of 1400245720 is 275420041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400245729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17503032 + ... + 17503111.

It is an arithmetic number, because the mean of its divisors is an integer number (196909560).

Almost surely, 2^1400245720 is an apocalyptic number.

1400245720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400245720 is an abundant number, since it is smaller than the sum of its proper divisors (1750307240).

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

1400245720 is a wasteful number, since it uses less digits than its factorization.

1400245720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35006154 (or 35006150 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1400245720 is about 37419.8572952918. The cubic root of 1400245720 is about 1118.7543868829.

Adding to 1400245720 its reverse (275420041), we get a palindrome (1675665761).

The spelling of 1400245720 in words is "one billion, four hundred million, two hundred forty-five thousand, seven hundred twenty".