1865400142 has 8 divisors (see below), whose sum is σ = 2919756816. Its totient is φ = 892147872.

The previous prime is 1865400139. The next prime is 1865400197. The reversal of 1865400142 is 2410045681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20276043 + ... + 20276134.

It is an arithmetic number, because the mean of its divisors is an integer number (364969602).

Almost surely, 2^1865400142 is an apocalyptic number.

1865400142 is a deficient number, since it is larger than the sum of its proper divisors (1054356674).

1865400142 is a wasteful number, since it uses less digits than its factorization.

1865400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40552202.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 1865400142 is about 43190.2783274199. The cubic root of 1865400142 is about 1230.9979654979.

The spelling of 1865400142 in words is "one billion, eight hundred sixty-five million, four hundred thousand, one hundred forty-two".