4388720438 has 16 divisors (see below), whose sum is σ = 6863280336. Its totient is φ = 2102886240.

The previous prime is 4388720407. The next prime is 4388720443. The reversal of 4388720438 is 8340278834.

It is a junction number, because it is equal to n+sod(n) for n = 4388720392 and 4388720401.

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, 476873 + ... + 485988.

It is an arithmetic number, because the mean of its divisors is an integer number (428955021).

Almost surely, 2^4388720438 is an apocalyptic number.

4388720438 is a deficient number, since it is larger than the sum of its proper divisors (2474559898).

4388720438 is a wasteful number, since it uses less digits than its factorization.

4388720438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962959.

The product of its (nonzero) digits is 1032192, while the sum is 47.

The square root of 4388720438 is about 66247.4183496987. The cubic root of 4388720438 is about 1637.2411028098.

The spelling of 4388720438 in words is "four billion, three hundred eighty-eight million, seven hundred twenty thousand, four hundred thirty-eight".