1438250740 has 12 divisors (see below), whose sum is σ = 3020326596. Its totient is φ = 575300288.

The previous prime is 1438250683. The next prime is 1438250747. The reversal of 1438250740 is 470528341.

It can be written as a sum of positive squares in 2 ways, for example, as 410791824 + 1027458916 = 20268^2 + 32054^2 .

It is a super-2 number, since 2×1438250740² = 4137130382221095200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1438250696 and 1438250705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438250747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35956249 + ... + 35956288.

It is an arithmetic number, because the mean of its divisors is an integer number (251693883).

Almost surely, 2^1438250740 is an apocalyptic number.

1438250740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438250740 is an abundant number, since it is smaller than the sum of its proper divisors (1582075856).

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

1438250740 is a wasteful number, since it uses less digits than its factorization.

1438250740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71912546 (or 71912544 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1438250740 is about 37924.2763938879. The cubic root of 1438250740 is about 1128.7857947456.

The spelling of 1438250740 in words is "one billion, four hundred thirty-eight million, two hundred fifty thousand, seven hundred forty".