10378781 has 24 divisors (see below), whose sum is σ = 12876864. Its totient is φ = 8184960.

The previous prime is 10378777. The next prime is 10378793. The reversal of 10378781 is 18787301.

It is not a de Polignac number, because 10378781 - 2² = 10378777 is a prime.

It is a super-2 number, since 2×10378781² = 215438190091922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10378741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241346 + ... + 241388.

It is an arithmetic number, because the mean of its divisors is an integer number (536536).

Almost surely, 2^10378781 is an apocalyptic number.

It is an amenable number.

10378781 is a deficient number, since it is larger than the sum of its proper divisors (2498083).

10378781 is an equidigital number, since it uses as much as digits as its factorization.

10378781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 10378781 is about 3221.6115532447. The cubic root of 10378781 is about 218.1300251166.

The spelling of 10378781 in words is "ten million, three hundred seventy-eight thousand, seven hundred eighty-one".