31488679540 has 48 divisors (see below), whose sum is σ = 66542727888. Its totient is φ = 12516286464.

The previous prime is 31488679531. The next prime is 31488679549. The reversal of 31488679540 is 4597688413.

It is an interprime number because it is at equal distance from previous prime (31488679531) and next prime (31488679549).

It can be written as a sum of positive squares in 8 ways, for example, as 5514844644 + 25973834896 = 74262^2 + 161164^2 .

It is a super-2 number, since 2×31488679540² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31488679549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3906154 + ... + 3914206.

It is an arithmetic number, because the mean of its divisors is an integer number (1386306831).

Almost surely, 2^31488679540 is an apocalyptic number.

It is an amenable number.

31488679540 is an abundant number, since it is smaller than the sum of its proper divisors (35054048348).

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

31488679540 is a wasteful number, since it uses less digits than its factorization.

31488679540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9268 (or 9266 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

It can be divided in two parts, 31488 and 679540, that added together give a triangular number (711028 = T₁₁₉₂).

The spelling of 31488679540 in words is "thirty-one billion, four hundred eighty-eight million, six hundred seventy-nine thousand, five hundred forty".