1438145136 has 30 divisors (see below), whose sum is σ = 4024809360. Its totient is φ = 479381664.

The previous prime is 1438145101. The next prime is 1438145147. The reversal of 1438145136 is 6315418341.

It is a super-2 number, since 2×1438145136² = 4136522864400916992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1438145136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4993416 + ... + 4993703.

It is an arithmetic number, because the mean of its divisors is an integer number (134160312).

Almost surely, 2^1438145136 is an apocalyptic number.

1438145136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1438145136 is an abundant number, since it is smaller than the sum of its proper divisors (2586664224).

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

1438145136 is a wasteful number, since it uses less digits than its factorization.

1438145136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987133 (or 9987124 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1438145136 is about 37922.8840675390. The cubic root of 1438145136 is about 1128.7581669221.

The spelling of 1438145136 in words is "one billion, four hundred thirty-eight million, one hundred forty-five thousand, one hundred thirty-six".