8401428 has 48 divisors (see below), whose sum is σ = 24895360. Its totient is φ = 2400192.

The previous prime is 8401427. The next prime is 8401429. The reversal of 8401428 is 8241048.

It is an interprime number because it is at equal distance from previous prime (8401427) and next prime (8401429).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4801 + ... + 6312.

Almost surely, 2^8401428 is an apocalyptic number.

It is an amenable number.

8401428 is an abundant number, since it is smaller than the sum of its proper divisors (16493932).

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

8401428 is a wasteful number, since it uses less digits than its factorization.

8401428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133 (or 11125 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 8401428 is about 2898.5216921734. The cubic root of 8401428 is about 203.2907898690.

The spelling of 8401428 in words is "eight million, four hundred one thousand, four hundred twenty-eight".