19400850 has 96 divisors (see below), whose sum is σ = 61127040. Its totient is φ = 4432320.

The previous prime is 19400819. The next prime is 19400851. The reversal of 19400850 is 5800491.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (19400851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8424 + ... + 10476.

It is an arithmetic number, because the mean of its divisors is an integer number (636740).

Almost surely, 2^19400850 is an apocalyptic number.

19400850 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 19400850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30563520).

19400850 is an abundant number, since it is smaller than the sum of its proper divisors (41726190).

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

19400850 is a wasteful number, since it uses less digits than its factorization.

19400850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 19400850 is about 4404.6395993316. The cubic root of 19400850 is about 268.7036624635.

The spelling of 19400850 in words is "nineteen million, four hundred thousand, eight hundred fifty".