1156428 has 72 divisors (see below), whose sum is σ = 3607968. Its totient is φ = 304128.

The previous prime is 1156427. The next prime is 1156429. The reversal of 1156428 is 8246511.

1156428 is a `hidden beast` number, since 1 + 15 + 642 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1156427) and next prime (1156429).

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

It is not an unprimeable number, because it can be changed into a prime (1156423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3100 + ... + 3452.

2^1156428 is an apocalyptic number.

1156428 is a gapful number since it is divisible by the number (18) 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 1156428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1803984).

1156428 is an abundant number, since it is smaller than the sum of its proper divisors (2451540).

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

1156428 is a wasteful number, since it uses less digits than its factorization.

1156428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 378 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1156428 is about 1075.3734235139. The cubic root of 1156428 is about 104.9637970428.

The spelling of 1156428 in words is "one million, one hundred fifty-six thousand, four hundred twenty-eight".