190420902 has 96 divisors (see below), whose sum is σ = 501696000. Its totient is φ = 52442208.

The previous prime is 190420883. The next prime is 190420903. The reversal of 190420902 is 209024091.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190420903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317599 + ... + 318197.

It is an arithmetic number, because the mean of its divisors is an integer number (5226000).

Almost surely, 2^190420902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190420902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250848000).

190420902 is an abundant number, since it is smaller than the sum of its proper divisors (311275098).

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

190420902 is a wasteful number, since it uses less digits than its factorization.

190420902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 190420902 is about 13799.3080261294. The cubic root of 190420902 is about 575.3139074895.

Adding to 190420902 its reverse (209024091), we get a palindrome (399444993).

The spelling of 190420902 in words is "one hundred ninety million, four hundred twenty thousand, nine hundred two".