140347820 has 24 divisors (see below), whose sum is σ = 304894800. Its totient is φ = 54203072.

The previous prime is 140347799. The next prime is 140347853. The reversal of 140347820 is 28743041.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120410 + ... + 121569.

It is an arithmetic number, because the mean of its divisors is an integer number (12703950).

Almost surely, 2^140347820 is an apocalyptic number.

140347820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140347820 is an abundant number, since it is smaller than the sum of its proper divisors (164546980).

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

140347820 is a wasteful number, since it uses less digits than its factorization.

140347820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242017 (or 242015 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 140347820 is about 11846.8485260849. The cubic root of 140347820 is about 519.6790672540.

The spelling of 140347820 in words is "one hundred forty million, three hundred forty-seven thousand, eight hundred twenty".