102220440 has 128 divisors (see below), whose sum is σ = 355484160. Its totient is φ = 23030784.

The previous prime is 102220403. The next prime is 102220451. The reversal of 102220440 is 44022201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60487 + ... + 62153.

It is an arithmetic number, because the mean of its divisors is an integer number (2777220).

Almost surely, 2^102220440 is an apocalyptic number.

102220440 is a gapful number since it is divisible by the number (10) 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 102220440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177742080).

102220440 is an abundant number, since it is smaller than the sum of its proper divisors (253263720).

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

102220440 is a wasteful number, since it uses less digits than its factorization.

102220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 102220440 is about 10110.4124544946. The cubic root of 102220440 is about 467.5692215458.

Adding to 102220440 its reverse (44022201), we get a palindrome (146242641).

The spelling of 102220440 in words is "one hundred two million, two hundred twenty thousand, four hundred forty".