1228740 has 24 divisors (see below), whose sum is σ = 3440640. Its totient is φ = 327648.

The previous prime is 1228693. The next prime is 1228741. The reversal of 1228740 is 478221.

It is a self number, because there is not a number n which added to its sum of digits gives 1228740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228741) 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, 10180 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (143360).

2^1228740 is an apocalyptic number.

1228740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228740 is an abundant number, since it is smaller than the sum of its proper divisors (2211900).

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

1228740 is a wasteful number, since it uses less digits than its factorization.

1228740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20491 (or 20489 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1228740 is about 1108.4854532198. The cubic root of 1228740 is about 107.1075286698.

The spelling of 1228740 in words is "one million, two hundred twenty-eight thousand, seven hundred forty".