11401428 has 24 divisors (see below), whose sum is σ = 27462400. Its totient is φ = 3677760.

The previous prime is 11401427. The next prime is 11401447. The reversal of 11401428 is 82410411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11401427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14953 + ... + 15696.

Almost surely, 2^11401428 is an apocalyptic number.

It is an amenable number.

11401428 is an abundant number, since it is smaller than the sum of its proper divisors (16060972).

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

11401428 is a wasteful number, since it uses less digits than its factorization.

11401428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30687 (or 30685 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 11401428 is about 3376.6000651543. The cubic root of 11401428 is about 225.0711083889.

Adding to 11401428 its reverse (82410411), we get a palindrome (93811839).

The spelling of 11401428 in words is "eleven million, four hundred one thousand, four hundred twenty-eight".