1012636390 has 16 divisors (see below), whose sum is σ = 1881544320. Its totient is φ = 391988160.

The previous prime is 1012636349. The next prime is 1012636441. The reversal of 1012636390 is 936362101.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 1632975 + ... + 1633594.

It is an arithmetic number, because the mean of its divisors is an integer number (117596520).

Almost surely, 2^1012636390 is an apocalyptic number.

1012636390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1012636390 is a deficient number, since it is larger than the sum of its proper divisors (868907930).

1012636390 is a wasteful number, since it uses less digits than its factorization.

1012636390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266607.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1012636390 is about 31821.9482433116. The cubic root of 1012636390 is about 1004.1945114742.

Adding to 1012636390 its reverse (936362101), we get a palindrome (1948998491).

The spelling of 1012636390 in words is "one billion, twelve million, six hundred thirty-six thousand, three hundred ninety".