1914990 has 64 divisors (see below), whose sum is σ = 5736960. Its totient is φ = 397440.

The previous prime is 1914971. The next prime is 1915007. The reversal of 1914990 is 994191.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 1896 + ... + 2724.

It is an arithmetic number, because the mean of its divisors is an integer number (89640).

2^1914990 is an apocalyptic number.

1914990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1914990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2868480).

1914990 is an abundant number, since it is smaller than the sum of its proper divisors (3821970).

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

1914990 is a wasteful number, since it uses less digits than its factorization.

1914990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1914990 is about 1383.8316371582. The cubic root of 1914990 is about 124.1811002745.

The spelling of 1914990 in words is "one million, nine hundred fourteen thousand, nine hundred ninety".