1990415 has 32 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 1257984.

The previous prime is 1990381. The next prime is 1990433. The reversal of 1990415 is 5140991.

It is not a de Polignac number, because 1990415 - 2⁸ = 1990159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37529 + ... + 37581.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2^1990415 is an apocalyptic number.

1990415 is a deficient number, since it is larger than the sum of its proper divisors (964465).

1990415 is a wasteful number, since it uses less digits than its factorization.

1990415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1990415 is about 1410.8206831486. The cubic root of 1990415 is about 125.7905102103.

1990415 divided by its sum of digits (29) gives a triangular number (68635 = T₃₇₀).

The spelling of 1990415 in words is "one million, nine hundred ninety thousand, four hundred fifteen".