77446040 has 32 divisors (see below), whose sum is σ = 199147680. Its totient is φ = 26552832.

The previous prime is 77446003. The next prime is 77446049. The reversal of 77446040 is 4064477.

It is a super-2 number, since 2×77446040² = 11995778223363200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77445988 and 77446006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77446049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138017 + ... + 138576.

It is an arithmetic number, because the mean of its divisors is an integer number (6223365).

Almost surely, 2^77446040 is an apocalyptic number.

77446040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77446040 is an abundant number, since it is smaller than the sum of its proper divisors (121701640).

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

77446040 is a wasteful number, since it uses less digits than its factorization.

77446040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276611 (or 276607 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 77446040 is about 8800.3431751268. The cubic root of 77446040 is about 426.2519760947.

The spelling of 77446040 in words is "seventy-seven million, four hundred forty-six thousand, forty".