1906402 has 8 divisors (see below), whose sum is σ = 2958300. Its totient is φ = 920304.

The previous prime is 1906393. The next prime is 1906417. The reversal of 1906402 is 2046091.

1906402 = T₃₄₈ + T₃₄₉ + ... + T₃₇₆.

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 4761 = 1379^2 + 69^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16377 + ... + 16492.

2^1906402 is an apocalyptic number.

1906402 is a deficient number, since it is larger than the sum of its proper divisors (1051898).

1906402 is a wasteful number, since it uses less digits than its factorization.

1906402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32900.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1906402 is about 1380.7251717847. The cubic root of 1906402 is about 123.9951871181.

The spelling of 1906402 in words is "one million, nine hundred six thousand, four hundred two".