1224557890 has 16 divisors (see below), whose sum is σ = 2210216832. Its totient is φ = 488487024.

The previous prime is 1224557849. The next prime is 1224557897. The reversal of 1224557890 is 987554221.

It is a super-2 number, since 2×1224557890² = 2999084051922504200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1224557897) 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, 163164 + ... + 170503.

It is an arithmetic number, because the mean of its divisors is an integer number (138138552).

Almost surely, 2^1224557890 is an apocalyptic number.

1224557890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1224557890 is a deficient number, since it is larger than the sum of its proper divisors (985658942).

1224557890 is a wasteful number, since it uses less digits than its factorization.

1224557890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334041.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1224557890 is about 34993.6835728964. The cubic root of 1224557890 is about 1069.8587433989.

The spelling of 1224557890 in words is "one billion, two hundred twenty-four million, five hundred fifty-seven thousand, eight hundred ninety".