10721438 has 16 divisors (see below), whose sum is σ = 19793760. Its totient is φ = 4241376.

The previous prime is 10721419. The next prime is 10721461. The reversal of 10721438 is 83412701.

10721438 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10721438² = 229898465575688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an alternating number because its digits alternate between odd and even.

10721438 is strictly pandigital in base 8.

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, 29273 + ... + 29636.

It is an arithmetic number, because the mean of its divisors is an integer number (1237110).

Almost surely, 2^10721438 is an apocalyptic number.

10721438 is a deficient number, since it is larger than the sum of its proper divisors (9072322).

10721438 is a wasteful number, since it uses less digits than its factorization.

10721438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58931.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 10721438 is about 3274.3607009613. The cubic root of 10721438 is about 220.5046130362.

The spelling of 10721438 in words is "ten million, seven hundred twenty-one thousand, four hundred thirty-eight".