1861950 has 24 divisors (see below), whose sum is σ = 4618008. Its totient is φ = 496480.

The previous prime is 1861927. The next prime is 1861961. The reversal of 1861950 is 591681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6057 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (192417).

2^1861950 is an apocalyptic number.

1861950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1861950 is an abundant number, since it is smaller than the sum of its proper divisors (2756058).

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

1861950 is a wasteful number, since it uses less digits than its factorization.

1861950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428 (or 12423 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1861950 is about 1364.5328871083. The cubic root of 1861950 is about 123.0238568306.

The spelling of 1861950 in words is "one million, eight hundred sixty-one thousand, nine hundred fifty".