190704864 has 144 divisors (see below), whose sum is σ = 591566976. Its totient is φ = 53625600.

The previous prime is 190704863. The next prime is 190704869. The reversal of 190704864 is 468407091.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190704863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333699 + ... + 334269.

It is an arithmetic number, because the mean of its divisors is an integer number (4108104).

Almost surely, 2^190704864 is an apocalyptic number.

190704864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190704864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295783488).

190704864 is an abundant number, since it is smaller than the sum of its proper divisors (400862112).

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

190704864 is a wasteful number, since it uses less digits than its factorization.

190704864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 190704864 is about 13809.5931873463. The cubic root of 190704864 is about 575.5997412172.

The spelling of 190704864 in words is "one hundred ninety million, seven hundred four thousand, eight hundred sixty-four".