1396888251 has 12 divisors (see below), whose sum is σ = 2047230696. Its totient is φ = 846598720.

The previous prime is 1396888247. The next prime is 1396888289. The reversal of 1396888251 is 1528886931.

1396888251 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1396888251 - 2² = 1396888247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1396888194 and 1396888203.

It is not an unprimeable number, because it can be changed into a prime (1396888201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1923726 + ... + 1924451.

It is an arithmetic number, because the mean of its divisors is an integer number (170602558).

Almost surely, 2^1396888251 is an apocalyptic number.

1396888251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1396888251 is a deficient number, since it is larger than the sum of its proper divisors (650342445).

1396888251 is a wasteful number, since it uses less digits than its factorization.

1396888251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848202 (or 3848191 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 1396888251 is about 37374.9682407892. The cubic root of 1396888251 is about 1117.8594988690.

The spelling of 1396888251 in words is "one billion, three hundred ninety-six million, eight hundred eighty-eight thousand, two hundred fifty-one".