2158402 has 8 divisors (see below), whose sum is σ = 3246012. Its totient is φ = 1076400.

The previous prime is 2158393. The next prime is 2158423. The reversal of 2158402 is 2048512.

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 441 = 1469^2 + 21^2 .

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

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, 249 + ... + 2092.

2^2158402 is an apocalyptic number.

2158402 is a deficient number, since it is larger than the sum of its proper divisors (1087610).

2158402 is a wasteful number, since it uses less digits than its factorization.

2158402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2158402 is about 1469.1500944424. The cubic root of 2158402 is about 129.2341958835.

It can be divided in two parts, 2 and 158402, that added together give a square (158404 = 398²).

The spelling of 2158402 in words is "two million, one hundred fifty-eight thousand, four hundred two".