19774040 has 64 divisors (see below), whose sum is σ = 52284960. Its totient is φ = 6635520.

The previous prime is 19773979. The next prime is 19774061. The reversal of 19774040 is 4047791.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19773988 and 19774006.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3992 + ... + 7448.

Almost surely, 2^19774040 is an apocalyptic number.

19774040 is a gapful number since it is divisible by the number (10) 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 19774040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26142480).

19774040 is an abundant number, since it is smaller than the sum of its proper divisors (32510920).

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

19774040 is a wasteful number, since it uses less digits than its factorization.

19774040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 19774040 is about 4446.8010974182. The cubic root of 19774040 is about 270.4156378454.

The spelling of 19774040 in words is "nineteen million, seven hundred seventy-four thousand, forty".