11974428 has 18 divisors (see below), whose sum is σ = 30268784. Its totient is φ = 3991464.

The previous prime is 11974423. The next prime is 11974439. The reversal of 11974428 is 82447911.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 332623 = 11974428 / (1 + 1 + 9 + 7 + 4 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 11974392 and 11974401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11974423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166276 + ... + 166347.

Almost surely, 2^11974428 is an apocalyptic number.

11974428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11974428 is an abundant number, since it is smaller than the sum of its proper divisors (18294356).

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

11974428 is a wasteful number, since it uses less digits than its factorization.

11974428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332633 (or 332628 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 11974428 is about 3460.4086463885. The cubic root of 11974428 is about 228.7801071185.

It can be divided in two parts, 1197 and 4428, that added together give a square (5625 = 75²).

The spelling of 11974428 in words is "eleven million, nine hundred seventy-four thousand, four hundred twenty-eight".