1913438 has 8 divisors (see below), whose sum is σ = 2885760. Its totient is φ = 951520.

The previous prime is 1913437. The next prime is 1913441. The reversal of 1913438 is 8343191.

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

It is a super-2 number, since 2×1913438² = 7322489959688, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1913438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (360720).

2^1913438 is an apocalyptic number.

1913438 is a deficient number, since it is larger than the sum of its proper divisors (972322).

1913438 is a wasteful number, since it uses less digits than its factorization.

1913438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202.

The product of its digits is 2592, while the sum is 29.

The square root of 1913438 is about 1383.2707616371. The cubic root of 1913438 is about 124.1475437621.

The spelling of 1913438 in words is "one million, nine hundred thirteen thousand, four hundred thirty-eight".