19290140 has 12 divisors (see below), whose sum is σ = 40509336. Its totient is φ = 7716048.

The previous prime is 19290137. The next prime is 19290151. The reversal of 19290140 is 4109291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482234 + ... + 482273.

It is an arithmetic number, because the mean of its divisors is an integer number (3375778).

Almost surely, 2^19290140 is an apocalyptic number.

19290140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19290140 is an abundant number, since it is smaller than the sum of its proper divisors (21219196).

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

19290140 is a wasteful number, since it uses less digits than its factorization.

19290140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964516 (or 964514 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 19290140 is about 4392.0541891010. The cubic root of 19290140 is about 268.1915723908.

The spelling of 19290140 in words is "nineteen million, two hundred ninety thousand, one hundred forty".