1240390146 has 32 divisors (see below), whose sum is σ = 2635698240. Its totient is φ = 388414656.

The previous prime is 1240390141. The next prime is 1240390157. The reversal of 1240390146 is 6410930421.

It is not an unprimeable number, because it can be changed into a prime (1240390141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89896 + ... + 102771.

It is an arithmetic number, because the mean of its divisors is an integer number (82365570).

Almost surely, 2^1240390146 is an apocalyptic number.

1240390146 is an abundant number, since it is smaller than the sum of its proper divisors (1395308094).

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

1240390146 is a wasteful number, since it uses less digits than its factorization.

1240390146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192738.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1240390146 is about 35219.1729885868. The cubic root of 1240390146 is about 1074.4497334511.

The spelling of 1240390146 in words is "one billion, two hundred forty million, three hundred ninety thousand, one hundred forty-six".