1964690 has 64 divisors (see below), whose sum is σ = 4644864. Its totient is φ = 580608.

The previous prime is 1964671. The next prime is 1964719. The reversal of 1964690 is 964691.

It is a super-2 number, since 2×1964690² = 7720013592200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1964690.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15407 + ... + 15533.

It is an arithmetic number, because the mean of its divisors is an integer number (72576).

2^1964690 is an apocalyptic number.

1964690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1964690 is an abundant number, since it is smaller than the sum of its proper divisors (2680174).

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

1964690 is a wasteful number, since it uses less digits than its factorization.

1964690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1964690 is about 1401.6739991881. The cubic root of 1964690 is about 125.2462346296.

Subtracting from 1964690 its reverse (964691), we obtain a palindrome (999999).

It can be divided in two parts, 19646 and 90, that multiplied together give a triangular number (1768140 = T₁₈₈₀).

The spelling of 1964690 in words is "one million, nine hundred sixty-four thousand, six hundred ninety".