140890815 has 96 divisors (see below), whose sum is σ = 288078336. Its totient is φ = 63037440.

The previous prime is 140890811. The next prime is 140890829. The reversal of 140890815 is 518098041.

It is not a de Polignac number, because 140890815 - 2² = 140890811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140890815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140890811) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 308067 + ... + 308523.

It is an arithmetic number, because the mean of its divisors is an integer number (3000816).

Almost surely, 2^140890815 is an apocalyptic number.

140890815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140890815 is an abundant number, since it is smaller than the sum of its proper divisors (147187521).

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

140890815 is a wasteful number, since it uses less digits than its factorization.

140890815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 140890815 is about 11869.7436787826. The cubic root of 140890815 is about 520.3484043346.

The spelling of 140890815 in words is "one hundred forty million, eight hundred ninety thousand, eight hundred fifteen".