19297140 has 24 divisors (see below), whose sum is σ = 54032160. Its totient is φ = 5145888.

The previous prime is 19297133. The next prime is 19297147. The reversal of 19297140 is 4179291.

It is an interprime number because it is at equal distance from previous prime (19297133) and next prime (19297147).

It is a super-2 number, since 2×19297140² = 744759224359200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19297147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160750 + ... + 160869.

It is an arithmetic number, because the mean of its divisors is an integer number (2251340).

Almost surely, 2^19297140 is an apocalyptic number.

19297140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19297140 is an abundant number, since it is smaller than the sum of its proper divisors (34735020).

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

19297140 is a wasteful number, since it uses less digits than its factorization.

19297140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321631 (or 321629 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 19297140 is about 4392.8510104487. The cubic root of 19297140 is about 268.2240088923.

The spelling of 19297140 in words is "nineteen million, two hundred ninety-seven thousand, one hundred forty".