22302440 has 32 divisors (see below), whose sum is σ = 51252480. Its totient is φ = 8730432.

The previous prime is 22302437. The next prime is 22302457. The reversal of 22302440 is 4420322.

22302440 = 658² + 659² + ... + 705².

It is a super-3 number, since 3×22302440³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4052 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (1601640).

Almost surely, 2^22302440 is an apocalyptic number.

22302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22302440 is an abundant number, since it is smaller than the sum of its proper divisors (28950040).

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

22302440 is a wasteful number, since it uses less digits than its factorization.

22302440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11921 (or 11917 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22302440 is about 4722.5459235459. The cubic root of 22302440 is about 281.4821069973.

Adding to 22302440 its reverse (4420322), we get a palindrome (26722762).

The spelling of 22302440 in words is "twenty-two million, three hundred two thousand, four hundred forty".