781250000 has 60 divisors (see below), whose sum is σ = 1892089836. Its totient is φ = 312500000.

The previous prime is 781249981. The next prime is 781250137. The reversal of 781250000 is 52187.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

781250000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 111682624 + 669567376 = 10568^2 + 25876^2 .

It is a super-2 number, since 2×781250000² = 1220703125000000000, which contains 22 as substring.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156249998 + ... + 156250002.

Almost surely, 2^781250000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946044918).

781250000 is an abundant number, since it is smaller than the sum of its proper divisors (1110839836).

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

781250000 is an frugal number, since it uses more digits than its factorization.

781250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 781250000 is about 27950.8497187474. The cubic root of 781250000 is about 921.0078746601.

The spelling of 781250000 in words is "seven hundred eighty-one million, two hundred fifty thousand".