1400139015 has 32 divisors (see below), whose sum is σ = 2509940736. Its totient is φ = 660504960.

The previous prime is 1400138969. The next prime is 1400139019. The reversal of 1400139015 is 5109310041.

It is not a de Polignac number, because 1400139015 - 2⁹ = 1400138503 is a prime.

It is a super-2 number, since 2×1400139015² = 3920778522650340450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400139019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108567 + ... + 120776.

It is an arithmetic number, because the mean of its divisors is an integer number (78435648).

Almost surely, 2^1400139015 is an apocalyptic number.

1400139015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1400139015 is a deficient number, since it is larger than the sum of its proper divisors (1109801721).

1400139015 is a wasteful number, since it uses less digits than its factorization.

1400139015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229399.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1400139015 is about 37418.4314877040. The cubic root of 1400139015 is about 1118.7259681281.

Adding to 1400139015 its reverse (5109310041), we get a palindrome (6509449056).

The spelling of 1400139015 in words is "one billion, four hundred million, one hundred thirty-nine thousand, fifteen".