140779815 has 16 divisors (see below), whose sum is σ = 245725056. Its totient is φ = 68256800.

The previous prime is 140779801. The next prime is 140779823. The reversal of 140779815 is 518977041.

It is not a de Polignac number, because 140779815 - 2⁷ = 140779687 is a prime.

It is a super-2 number, since 2×140779815² = 39637912622868450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426441 + ... + 426770.

It is an arithmetic number, because the mean of its divisors is an integer number (15357816).

Almost surely, 2^140779815 is an apocalyptic number.

140779815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140779815 is a deficient number, since it is larger than the sum of its proper divisors (104945241).

140779815 is a wasteful number, since it uses less digits than its factorization.

140779815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853230.

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 140779815 is about 11865.0670036035. The cubic root of 140779815 is about 520.2117172889.

The spelling of 140779815 in words is "one hundred forty million, seven hundred seventy-nine thousand, eight hundred fifteen".