2146139394 has 32 divisors (see below), whose sum is σ = 4908963840. Its totient is φ = 612744912.

The previous prime is 2146139389. The next prime is 2146139399. The reversal of 2146139394 is 4939316412.

It is an interprime number because it is at equal distance from previous prime (2146139389) and next prime (2146139399).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (2146139399) 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, 43767 + ... + 78789.

It is an arithmetic number, because the mean of its divisors is an integer number (153405120).

Almost surely, 2^2146139394 is an apocalyptic number.

2146139394 is an abundant number, since it is smaller than the sum of its proper divisors (2762824446).

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

2146139394 is a wasteful number, since it uses less digits than its factorization.

2146139394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36494.

The product of its digits is 139968, while the sum is 42.

The square root of 2146139394 is about 46326.4437875389. The cubic root of 2146139394 is about 1289.8898998636.

The spelling of 2146139394 in words is "two billion, one hundred forty-six million, one hundred thirty-nine thousand, three hundred ninety-four".