738408641 has 4 divisors (see below), whose sum is σ = 739132884. Its totient is φ = 737684400.

The previous prime is 738408631. The next prime is 738408653. The reversal of 738408641 is 146804837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146804837 = 23 ⋅6382819.

It can be written as a sum of positive squares in 2 ways, for example, as 365918641 + 372490000 = 19129^2 + 19300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738408641 is a prime.

It is a super-2 number, since 2×738408641² = 1090494642206933762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (738408631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 360590 + ... + 362631.

It is an arithmetic number, because the mean of its divisors is an integer number (184783221).

Almost surely, 2^738408641 is an apocalyptic number.

It is an amenable number.

738408641 is a deficient number, since it is larger than the sum of its proper divisors (724243).

738408641 is a wasteful number, since it uses less digits than its factorization.

738408641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724242.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 738408641 is about 27173.6755151010. The cubic root of 738408641 is about 903.8553300647.

It can be divided in two parts, 738408 and 641, that multiplied together give a triangular number (473319528 = T₃₀₇₆₇).

The spelling of 738408641 in words is "seven hundred thirty-eight million, four hundred eight thousand, six hundred forty-one".