26451820 has 12 divisors (see below), whose sum is σ = 55548864. Its totient is φ = 10580720.

The previous prime is 26451811. The next prime is 26451827. The reversal of 26451820 is 2815462.

It is not an unprimeable number, because it can be changed into a prime (26451827) 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, 661276 + ... + 661315.

It is an arithmetic number, because the mean of its divisors is an integer number (4629072).

Almost surely, 2^26451820 is an apocalyptic number.

26451820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26451820 is an abundant number, since it is smaller than the sum of its proper divisors (29097044).

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

26451820 is a wasteful number, since it uses less digits than its factorization.

26451820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322600 (or 1322598 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 26451820 is about 5143.1332862371. The cubic root of 26451820 is about 297.9558062476.

It can be divided in two parts, 2645 and 1820, that added together give a triangular number (4465 = T₉₄).

The spelling of 26451820 in words is "twenty-six million, four hundred fifty-one thousand, eight hundred twenty".