1022001408 has 72 divisors (see below), whose sum is σ = 3022258400. Its totient is φ = 340664832.

The previous prime is 1022001373. The next prime is 1022001437. The reversal of 1022001408 is 8041002201.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67018 + ... + 80841.

Almost surely, 2^1022001408 is an apocalyptic number.

1022001408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1022001408 is an abundant number, since it is smaller than the sum of its proper divisors (2000256992).

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

1022001408 is an equidigital number, since it uses as much as digits as its factorization.

1022001408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147884 (or 147864 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1022001408 is about 31968.7567477999. The cubic root of 1022001408 is about 1007.2806659256.

Adding to 1022001408 its reverse (8041002201), we get a palindrome (9063003609).

The spelling of 1022001408 in words is "one billion, twenty-two million, one thousand, four hundred eight".